$POWL
POWELL INDUSTRIES INC Stock $powl

$powl Overview Financials Valuation SEC Filings Company Website

2020 Q3 Form 10-K Financial Statement

#000008042020000036 Filed on December 09, 2020

Income Statement

Concept	2020 Q3	2019 Q3	2019 Q2
Revenue	$114.7M	$148.5M	$135.6M
YoY Change	-22.75%	10.09%	11.02%
Cost Of Revenue	$93.00M	$119.9M	$111.9M
YoY Change	-22.44%	8.12%	7.82%
Gross Profit	$21.72M	$28.56M	$23.72M
YoY Change	-23.94%	18.95%	29.06%
Gross Profit Margin	18.93%	19.23%	17.49%
Selling, General & Admin	$16.30M	$19.70M	$17.12M
YoY Change	-17.26%	7.65%	5.83%
% of Gross Profit	75.05%	68.99%	72.18%
Research & Development	$1.400M	$1.300M	$1.631M
YoY Change	7.69%	-27.78%	-0.06%
% of Gross Profit	6.45%	4.55%	6.88%
Depreciation & Amortization	$2.600M	$2.600M	$2.900M
YoY Change	0.0%	-18.75%	-12.12%
% of Gross Profit	11.97%	9.11%	12.23%
Operating Expenses	$17.70M	$21.10M	$18.75M
YoY Change	-16.11%	4.98%	5.29%
Operating Profit	$4.020M	$7.455M	$5.640M
YoY Change	-46.08%	90.91%	974.29%
Interest Expense	$0.00	$300.0K	$59.00K
YoY Change	-100.0%	200.0%	15.69%
% of Operating Profit	0.0%	4.02%	1.05%
Other Income/Expense, Net	$500.0K	$0.00	$0.00
YoY Change		-100.0%
Pretax Income	$4.500M	$8.000M	$5.886M
YoY Change	-43.75%	135.29%	754.28%
Income Tax	$1.500M	$1.500M	$797.0K
% Of Pretax Income	33.33%	18.75%	13.54%
Net Earnings	$2.983M	$6.538M	$5.089M
YoY Change	-54.37%	324.82%	1590.7%
Net Earnings / Revenue	2.6%	4.4%	3.75%
Basic Earnings Per Share	$0.26	$0.56	$0.44
Diluted Earnings Per Share	$0.25	$0.56	$0.44
COMMON SHARES
Basic Shares Outstanding	11.61M shares	11.57M shares	11.58M shares
Diluted Shares Outstanding			11.60M shares

Balance Sheet

Concept	2020 Q3	2019 Q3	2019 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$178.9M	$124.7M	$78.00M
YoY Change	43.46%	150.4%	41.05%
Cash & Equivalents	$160.2M	$118.6M	$71.92M
Short-Term Investments	$18.70M	$6.000M	$6.100M
Other Short-Term Assets	$1.948M	$2.650M	$2.398M
YoY Change	-26.49%	320.63%	847.83%
Inventory	$28.97M	$29.20M	$29.48M
Prepaid Expenses	$4.402M	$4.335M	$3.316M
Receivables	$69.96M	$112.1M	$108.6M
Other Receivables	$400.0K	$200.0K	$100.0K
Total Short-Term Assets	$335.7M	$328.6M	$287.3M
YoY Change	2.16%	18.76%	13.81%
LONG-TERM ASSETS
Property, Plant & Equipment	$114.4M	$120.8M	$121.9M
YoY Change	-5.33%	-6.18%	-6.62%
Goodwill	$1.000M	$1.000M
YoY Change	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$12.23M	$11.58M	$11.11M
YoY Change	5.61%	4.42%	-19.97%
Total Long-Term Assets	$136.6M	$138.8M	$149.8M
YoY Change	-1.6%	-9.42%	-4.09%
TOTAL ASSETS
Total Short-Term Assets	$335.7M	$328.6M	$287.3M
Total Long-Term Assets	$136.6M	$138.8M	$149.8M
Total Assets	$472.3M	$467.4M	$437.1M
YoY Change	1.04%	8.71%	6.96%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$35.03M	$51.18M	$38.48M
YoY Change	-31.56%	25.71%	14.1%
Accrued Expenses	$26.90M	$23.10M	$19.30M
YoY Change	16.45%	-7.23%	3.76%
Deferred Revenue	$79.45M	$71.46M	$60.87M
YoY Change	11.17%	65.53%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$400.0K	$400.0K	$400.0K
YoY Change	0.0%	0.0%	0.0%
Total Short-Term Liabilities	$152.9M	$157.9M	$129.8M
YoY Change	-3.13%	33.98%	30.95%
LONG-TERM LIABILITIES
Long-Term Debt	$400.0K	$800.0K	$800.0K
YoY Change	-50.0%	-33.33%	-33.33%
Other Long-Term Liabilities	$2.161M	$3.115M	$4.349M
YoY Change	-30.63%	-7.18%	253.0%
Total Long-Term Liabilities	$2.561M	$3.915M	$5.149M
YoY Change	-34.58%	-14.07%	111.72%
TOTAL LIABILITIES
Total Short-Term Liabilities	$152.9M	$157.9M	$129.8M
Total Long-Term Liabilities	$2.561M	$3.915M	$5.149M
Total Liabilities	$165.7M	$168.3M	$141.4M
YoY Change	-1.55%	31.14%	31.94%
SHAREHOLDERS EQUITY
Retained Earnings	$294.0M	$289.4M	$285.9M
YoY Change	1.59%	-0.72%	-2.42%
Common Stock	$62.00M	$59.15M	$57.84M
YoY Change	4.81%	4.2%	2.85%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$25.00M	$25.00M	$25.00M
YoY Change	0.0%	0.0%	0.0%
Treasury Stock Shares	806.0K shares	806.0K shares	806.0K shares
Shareholders Equity	$306.6M	$299.2M	$295.7M
YoY Change
Total Liabilities & Shareholders Equity	$472.3M	$467.4M	$437.1M
YoY Change	1.04%	8.71%	6.96%

Cashflow Statement

Concept	2020 Q3	2019 Q3	2019 Q2
OPERATING ACTIVITIES
Net Income	$2.983M	$6.538M	$5.089M
YoY Change	-54.37%	324.82%	1590.7%
Depreciation, Depletion And Amortization	$2.600M	$2.600M	$2.900M
YoY Change	0.0%	-18.75%	-12.12%
Cash From Operating Activities	$19.00M	$34.90M	$7.900M
YoY Change	-45.56%	-1554.17%	-150.97%
INVESTING ACTIVITIES
Capital Expenditures	-$800.0K	-$1.100M	-$1.200M
YoY Change	-27.27%	120.0%	9.09%
Acquisitions
YoY Change
Other Investing Activities	-$11.20M	$0.00	$0.00
YoY Change		-100.0%	-100.0%
Cash From Investing Activities	-$12.00M	-$1.000M	-$1.300M
YoY Change	1100.0%	-127.78%	-130.23%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-3.000M	-3.400M	-3.000M
YoY Change	-11.76%	9.68%	-3.23%
NET CHANGE
Cash From Operating Activities	19.00M	34.90M	7.900M
Cash From Investing Activities	-12.00M	-1.000M	-1.300M
Cash From Financing Activities	-3.000M	-3.400M	-3.000M
Net Change In Cash	4.000M	30.50M	3.600M
YoY Change	-86.89%	-1705.26%	-125.17%
FREE CASH FLOW
Cash From Operating Activities	$19.00M	$34.90M	$7.900M
Capital Expenditures	-$800.0K	-$1.100M	-$1.200M
Free Cash Flow	$19.80M	$36.00M	$9.100M
YoY Change	-45.0%	-1994.74%	-163.19%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Trading Symbol TradingSymbol	POWL
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	88-0106100
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--09-30
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P1Y
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-09-30
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	001-12488
CY2020	dei	Entity Registrant Name EntityRegistrantName	Powell Industries, Inc.
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	8550 Mosley Road
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Houston
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	TX
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	77075-1180
CY2020	dei	City Area Code CityAreaCode	713
CY2020	dei	Local Phone Number LocalPhoneNumber	944-6900
CY2020	dei	Security12b Title Security12bTitle	Common Stock, par value $0.01 per share
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CY2020	dei	Entity Shell Company EntityShellCompany	false
CY2020	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
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CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
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CY2020	dei	Entity Shell Company EntityShellCompany	false
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CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.04
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.04
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.04
CY2020	us-gaap	Net Income Loss NetIncomeLoss	16660000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	9890000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-7152000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	60000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-2743000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-3100000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	26000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	25000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-75000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	16694000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	7122000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-10177000	USD
CY2017Q3	us-gaap	Stockholders Equity StockholdersEquity	321296000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-7152000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-3100000	USD
CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	3152000	USD
CY2018	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	712000	USD
CY2018	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	1000	USD
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	11916000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-20000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-75000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	301644000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	9890000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-2743000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	3839000	USD
CY2019	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	1454000	USD
CY2019	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	11998000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-7000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	25000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	299153000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	16660000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	60000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	3474000	USD
CY2020	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	629000	USD
CY2020	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	12066000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-7000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	26000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	306626000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	16660000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	9890000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-7152000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	10538000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	12032000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	12903000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	3474000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	3839000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	3152000	USD
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	258000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	233000	USD
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	111000	USD
CY2020	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	1473000	USD
CY2019	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	820000	USD
CY2018	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-2170000	USD
CY2020	us-gaap	Gain Loss On Disposition Of Intangible Assets GainLossOnDispositionOfIntangibleAssets	0	USD
CY2019	us-gaap	Gain Loss On Disposition Of Intangible Assets GainLossOnDispositionOfIntangibleAssets	0	USD
CY2018	us-gaap	Gain Loss On Disposition Of Intangible Assets GainLossOnDispositionOfIntangibleAssets	507000	USD
CY2020	powl	Gain Loss On Cash Surrender Value Of Life Insurance GainLossOnCashSurrenderValueOfLifeInsurance	506000	USD
CY2019	powl	Gain Loss On Cash Surrender Value Of Life Insurance GainLossOnCashSurrenderValueOfLifeInsurance	0	USD
CY2018	powl	Gain Loss On Cash Surrender Value Of Life Insurance GainLossOnCashSurrenderValueOfLifeInsurance	240000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-41969000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	20193000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	37176000	USD
CY2020	powl	Increase Decrease In Contract With Customer Asset And Liability Net IncreaseDecreaseInContractWithCustomerAssetAndLiabilityNet	-12546000	USD
CY2019	powl	Increase Decrease In Contract With Customer Asset And Liability Net IncreaseDecreaseInContractWithCustomerAssetAndLiabilityNet	-55333000	USD
CY2018	powl	Increase Decrease In Contract With Customer Asset And Liability Net IncreaseDecreaseInContractWithCustomerAssetAndLiabilityNet	14117000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-304000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	7989000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	3023000	USD
CY2020	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	720000	USD
CY2019	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	6681000	USD
CY2018	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	996000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-662000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	2626000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	237000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-15309000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	9550000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	8152000	USD
CY2020	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	465000	USD
CY2019	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	1419000	USD
CY2018	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	8859000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	860000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	230000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-1906000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	10433000	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	400000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	72394000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	68759000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-28543000	USD
CY2020	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	18553000	USD
CY2019	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	5869000	USD
CY2018	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	22261000	USD
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Shortterm Investments ProceedsFromMaturitiesPrepaymentsAndCallsOfShorttermInvestments	6146000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Shortterm Investments ProceedsFromMaturitiesPrepaymentsAndCallsOfShorttermInvestments	13088000	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Shortterm Investments ProceedsFromMaturitiesPrepaymentsAndCallsOfShorttermInvestments	35248000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5130000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4255000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4415000	USD
CY2020	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	USD
CY2019	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	USD
CY2018	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	1861000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-17537000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	2964000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	400000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	629000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	400000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1454000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	712000	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	12066000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	11998000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	11916000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-13095000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-13852000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-13028000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	41762000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	57871000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-31138000	USD
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-185000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-957000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-347000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	118639000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	61725000	USD
CY2017Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	93210000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	160216000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	118639000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	61725000	USD
CY2020	us-gaap	Nature Of Operations NatureOfOperations	Business and Organization<div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Powell Industries, Inc. (we, us, our, Powell or the Company) was incorporated in the state of Delaware in 2004 as a successor to a Nevada company incorporated in 1968. The Nevada company was the successor to a company founded by William E. Powell in 1947, which merged into the Company in 1977. Our major subsidiaries, all of which are wholly owned, include: Powell Electrical Systems, Inc.; Powell (UK) Limited; Powell Canada Inc.; and Powell Industries International, B.V.</span></div><div style="margin-top:12pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We develop, design, manufacture and service custom-engineered equipment and systems which (1) distribute, control and monitor the flow of electrical energy and (2) provide protection to motors, transformers and other electrically powered equipment. Our principal products include integrated power control room substations (PCRs®), custom-engineered modules, electrical houses (E-Houses), traditional and arc-resistant distribution switchgear and control gear, medium-voltage circuit breakers, monitoring and control communications systems, motor control centers, switches and bus duct systems. These products are designed for application voltages ranging from 480 volts to 38,000 volts and are used in oil and gas refining, onshore and offshore oil and gas production, petrochemical, liquefied natural gas (LNG) terminals, pipeline, terminal, mining and metals, light rail traction power, electric utility, pulp and paper and other heavy industrial markets. Our product scope includes designs tested to meet both U.S. and international standards, under both the American National Standards Institute (ANSI) and International Electrotechnical Commission. We assist customers by providing value-added services such as spare parts, field service inspection, installation, commissioning, modification and repair, retrofit and retrofill components for existing systems and replacement circuit breakers for switchgear that is obsolete or that is no longer produced by the original manufacturer. We seek to establish long-term relationships with the end users of our systems as well as the design and construction engineering firms contracted by those end users. We believe that our culture of safety and focus on customer satisfaction, along with our financial strength, allow us to continue to capitalize on opportunities in the industries we serve.</span></div><div style="margin-top:12pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">References to Fiscal 2020, Fiscal 2019 and Fiscal 2018 used throughout these Notes to Consolidated Financial Statements relate to our fiscal years ended September 30, 2020, 2019 and 2018, respectively.</span></div><div style="margin-top:12pt;text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Impact of the COVID-19 Pandemic and Oil and Gas Commodity Market</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"> Volatility </span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">on Powell</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The spread of COVID-19 has created significant uncertainty and economic disruption across the world during the second half of Fiscal 2020 and continuing into Fiscal 2021. This pandemic has negatively impacted energy demand, which in turn has resulted in considerable volatility across the oil and gas commodity markets. As a result, some of our industrial customers are deferring or suspending their planned capital expenditures. Certain of our customers have asked that we delay our manufacturing on their projects as their operations have been negatively impacted by this pandemic and the reduced oil and gas demand. We continue to work with and review the contracts with our key suppliers who have been impacted by this pandemic to ensure that we are able to meet our customer commitments.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">From an operational standpoint, although our facilities are located in areas that have been or continue to be subject to stay-at-home orders, we have not closed any of our facilities for an extended amount of time and have continued to operate as an "essential business" under these orders across all of our locations. We continue to take the necessary steps to ensure the safety of our employees, customers and vendors. These steps include, among others, promoting increased social distancing practices and enhanced cleaning efforts in our offices and facilities. We are also using technology across our operations to further enhance social distancing and improve safety. These increased safety precautions may have an adverse impact on our efficiency and productivity going forward.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As a result of the circumstances noted above, we anticipate that a decrease in commercial activity will negatively impact our business, results of operations and cash flows going forward. We have and may need to continue to adjust our workforce and labor costs to correspond to the reduced customer demand. We will take prudent measures to maintain our strong liquidity and cash position, which may include reducing our capital expenditures and research and development costs, as well as reducing or eliminating future dividend payments. However, the extent to which the COVID-19 pandemic specifically will impact our business will depend on numerous factors that are hard to predict, some of which include: the duration, spread and severity of the pandemic; governmental actions in response to the pandemic, including travel restrictions and quarantine or related governmental orders; any closures of our offices and facilities or those of our suppliers as a result of the pandemic, and how quickly and to what extent normal economic and operating conditions can resume. Therefore, the magnitude of the impact on our business, results of operations and cash flows is not currently known.</span></div>
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-top:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of Estimates</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of financial statements in conformity with accounting principles generally accepted in the United States (U.S. GAAP) requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying footnotes. The most significant estimates used in our financial statements affect revenue recognition and estimated cost recognition on our customer contracts, the allowance for doubtful accounts, provision for excess and obsolete inventory, warranty accruals and income taxes. The amounts recorded for warranties, legal, income taxes, impairment of long-lived assets (when applicable) and other contingent liabilities require judgments regarding the amount of expenses that will ultimately be incurred. We base our estimates on historical experience and on various other assumptions, as well as the specific circumstances surrounding these contingent liabilities, in evaluating the amount of liability that should be recorded. Additionally, the recognition of deferred tax assets requires estimates related to future income and other assumptions regarding timing and future profitability because the ultimate realization of net deferred tax assets is dependent on the generation of future taxable income during periods in which temporary differences become deductible. Estimates routinely change as new events occur, additional information becomes available or operating environments change. Actual results may differ from our prior estimates.</span></div>
CY2020	powl	Interest Paid Net Of Interest Income InterestPaidNetOfInterestIncome	-753000	USD
CY2019	powl	Interest Paid Net Of Interest Income InterestPaidNetOfInterestIncome	-873000	USD
CY2018	powl	Interest Paid Net Of Interest Income InterestPaidNetOfInterestIncome	-676000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1770000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-5219000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	354000	USD
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	264000	USD
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	1248000	USD
CY2018	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	129000	USD
CY2020Q3	us-gaap	Contract With Customer Receivable After Allowance For Credit Loss Current ContractWithCustomerReceivableAfterAllowanceForCreditLossCurrent	5900000	USD
CY2020	powl	Warranty Parts And Services Date Of Shipment Period WarrantyPartsAndServicesDateOfShipmentPeriod	P18M
CY2020	powl	Warranty Parts And Services Date Of Energization Period WarrantyPartsAndServicesDateOfEnergizationPeriod	P12M
CY2020	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	6300000	USD
CY2019	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	6300000	USD
CY2018	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	6700000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	16660000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	9890000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-7152000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	11624000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	11571000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	11507000	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	69000	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	63000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	11693000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	11634000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	11507000	shares
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.43
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	258000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	233000	USD
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.85
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.62
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.42
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.85
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.62
CY2019Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	301000	USD
CY2018Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	157000	USD
CY2020	powl	Allowance For Doubtful Accounts Receivable Write Offs Recoveries AllowanceForDoubtfulAccountsReceivableWriteOffsRecoveries	32000	USD
CY2019	powl	Allowance For Doubtful Accounts Receivable Write Offs Recoveries AllowanceForDoubtfulAccountsReceivableWriteOffsRecoveries	81000	USD
CY2020	powl	Increase Decrease Due To Foreign Currency Translation IncreaseDecreaseDueToForeignCurrencyTranslation	-17000	USD
CY2019	powl	Increase Decrease Due To Foreign Currency Translation IncreaseDecreaseDueToForeignCurrencyTranslation	-8000	USD
CY2020Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	510000	USD
CY2019Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	301000	USD
CY2020Q3	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	31202000	USD
CY2019Q3	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	31781000	USD
CY2020Q3	us-gaap	Inventory Work In Process InventoryWorkInProcess	1539000	USD
CY2019Q3	us-gaap	Inventory Work In Process InventoryWorkInProcess	1100000	USD
CY2020Q3	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	3773000	USD
CY2019Q3	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	3679000	USD
CY2020Q3	us-gaap	Inventory Net InventoryNet	28968000	USD
CY2019Q3	us-gaap	Inventory Net InventoryNet	29202000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	258117000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	256233000	USD
CY2020Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	143745000	USD
CY2019Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	135421000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	114372000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	120812000	USD
CY2020	us-gaap	Depreciation Depreciation	10400000	USD
CY2019	us-gaap	Depreciation Depreciation	11900000	USD
CY2018	us-gaap	Depreciation Depreciation	12700000	USD
CY2019Q3	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	2946000	USD
CY2018Q3	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	2604000	USD
CY2020	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	2286000	USD
CY2019	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	3004000	USD
CY2020	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	2463000	USD
CY2019Q3	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	55374000	USD
CY2020Q3	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	79445000	USD
CY2019Q3	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	71464000	USD
CY2020Q3	powl	Contract With Customer Asset Liability Net Current ContractWithCustomerAssetLiabilityNetCurrent	-28450000	USD
CY2019	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	2649000	USD
CY2020	us-gaap	Standard And Extended Product Warranty Accrual Foreign Currency Translation Gain Loss StandardAndExtendedProductWarrantyAccrualForeignCurrencyTranslationGainLoss	-2000	USD
CY2019	us-gaap	Standard And Extended Product Warranty Accrual Foreign Currency Translation Gain Loss StandardAndExtendedProductWarrantyAccrualForeignCurrencyTranslationGainLoss	13000	USD
CY2020Q3	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	2771000	USD
CY2019Q3	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	2946000	USD
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	476800000	USD
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	282500000	USD
CY2020	us-gaap	Contract With Customer Asset Cumulative Catch Up Adjustment To Revenue Change In Measure Of Progress ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress	11300000	USD
CY2019	us-gaap	Contract With Customer Asset Cumulative Catch Up Adjustment To Revenue Change In Measure Of Progress ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress	5100000	USD
CY2020Q3	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	50995000	USD
CY2019Q3	powl	Contract With Customer Asset Liability Net Current ContractWithCustomerAssetLiabilityNetCurrent	-16090000	USD
CY2020	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	71000000	USD
CY2020Q3	us-gaap	Contract With Customer Receivable After Allowance For Credit Loss ContractWithCustomerReceivableAfterAllowanceForCreditLoss	6900000	USD
CY2019Q3	us-gaap	Contract With Customer Receivable After Allowance For Credit Loss ContractWithCustomerReceivableAfterAllowanceForCreditLoss	5600000	USD
CY2020Q3	us-gaap	Contract With Customer Receivable After Allowance For Credit Loss Current ContractWithCustomerReceivableAfterAllowanceForCreditLossCurrent	5900000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	200000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	200000	USD
CY2020Q3	us-gaap	Contract With Customer Receivable After Allowance For Credit Loss Noncurrent ContractWithCustomerReceivableAfterAllowanceForCreditLossNoncurrent	1000000.0	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	518499000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	517180000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	518499000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	517180000	USD
CY2020Q3	us-gaap	Goodwill Goodwill	1000000.0	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	200000	USD
CY2020Q3	powl	Commitments And Contingencies Additional Bonding Capacity CommitmentsAndContingenciesAdditionalBondingCapacity	587600000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	157000	USD
CY2020Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	400000	USD
CY2020Q3	us-gaap	Long Term Debt LongTermDebt	800000	USD
CY2019Q3	us-gaap	Long Term Debt LongTermDebt	1200000	USD
CY2020Q3	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	400000	USD
CY2019Q3	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	400000	USD
CY2020Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	400000	USD
CY2019Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	800000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	400000	USD
CY2020	powl	Credit Agreement Cash Collateral Requirement For Guarantees Period Greater Than CreditAgreementCashCollateralRequirementForGuaranteesPeriodGreaterThan	P2Y
CY2020Q3	us-gaap	Loss Contingency Estimate Of Possible Loss LossContingencyEstimateOfPossibleLoss	2400000	USD
CY2020	powl	Loss Contingency Probable Loss In Period LossContingencyProbableLossInPeriod	200000	USD
CY2020	us-gaap	Contract With Customer Liability Cumulative Catch Up Adjustment To Revenue Change In Measure Of Progress ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress	200000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	945000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1350000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	973000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1186000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	186000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	201000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	66000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	88000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	449000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	2197000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1624000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1623000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1045000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	366000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-1834000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-91000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	457000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-247000	USD
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	519000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-3000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-89000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1473000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	820000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2170000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3670000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2444000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-547000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	21243000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	11859000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-2103000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-913000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	475000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-5596000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	20330000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	12334000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-7699000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.25
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.05
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.04
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.02
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.13
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.07
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	-0.09
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.01
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.01
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings	0.01
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings	-0.03
CY2020	powl	Effective Income Tax Rate Reconciliation Change In Foreign And Domestic Valuation Allowance Percent EffectiveIncomeTaxRateReconciliationChangeInForeignAndDomesticValuationAllowancePercent	-0.04
CY2019	powl	Effective Income Tax Rate Reconciliation Change In Foreign And Domestic Valuation Allowance Percent EffectiveIncomeTaxRateReconciliationChangeInForeignAndDomesticValuationAllowancePercent	0.02
CY2018	powl	Effective Income Tax Rate Reconciliation Change In Foreign And Domestic Valuation Allowance Percent EffectiveIncomeTaxRateReconciliationChangeInForeignAndDomesticValuationAllowancePercent	0.20
CY2020Q3	powl	Deferred Tax Liabilities Retention And Other DeferredTaxLiabilitiesRetentionAndOther	620000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.04
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0.01
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0.02
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0.01
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.18
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.20
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.07
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.245
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.18
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.20
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.07
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.18
CY2020Q2	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	1700000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	500000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Settlements Domestic IncomeTaxReconciliationTaxSettlementsDomestic	500000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	500000	USD
CY2020Q3	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	16100000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	18326000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	18851000	USD
CY2020Q3	powl	Deferred Tax Liabilities Gross And Valuation Allowance DeferredTaxLiabilitiesGrossAndValuationAllowance	14682000	USD
CY2019Q3	powl	Deferred Tax Liabilities Gross And Valuation Allowance DeferredTaxLiabilitiesGrossAndValuationAllowance	13734000	USD
CY2020Q3	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	3644000	USD
CY2019Q3	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	5117000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	10823000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	10636000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	1490000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	2895000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	1681000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	1590000	USD
CY2020Q3	powl	Deferred Tax Assets Uniform Capitalization And Inventory DeferredTaxAssetsUniformCapitalizationAndInventory	1067000	USD
CY2019Q3	powl	Deferred Tax Assets Uniform Capitalization And Inventory DeferredTaxAssetsUniformCapitalizationAndInventory	983000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	1079000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	744000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	929000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	752000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves	655000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves	682000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	112000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	115000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	111000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	110000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	379000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	344000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	18326000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	18851000	USD
CY2020Q3	powl	Deferred Tax Liabilities Depreciation And Amortization DeferredTaxLiabilitiesDepreciationAndAmortization	5035000	USD
CY2019Q3	powl	Deferred Tax Liabilities Depreciation And Amortization DeferredTaxLiabilitiesDepreciationAndAmortization	5138000	USD
CY2019Q3	powl	Deferred Tax Liabilities Retention And Other DeferredTaxLiabilitiesRetentionAndOther	365000	USD
CY2020Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	5655000	USD
CY2019Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	5503000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	9027000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	8231000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	3644000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	5117000	USD
CY2020Q3	us-gaap	Tax Credit Carryforward Amount TaxCreditCarryforwardAmount	100000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	9000000.0	USD
CY2020	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	800000	USD
CY2019Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2703000	USD
CY2018Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1854000	USD
CY2017Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1219000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	220000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	240000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	180000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	97000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	609000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	455000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	545000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	1223000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2020Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1252000	USD
CY2019Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2703000	USD
CY2018Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1854000	USD
CY2020Q3	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	800000	USD
CY2019Q3	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	2100000	USD
CY2018Q3	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	1300000	USD
CY2020Q3	us-gaap	Decrease In Unrecognized Tax Benefits Is Reasonably Possible DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	100000	USD
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	3100000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	3200000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2800000	USD
CY2020	powl	Deferred Compensation Arrangement With Individual Age Of Individual DeferredCompensationArrangementWithIndividualAgeOfIndividual	P65Y
CY2020	us-gaap	Deferred Compensation Arrangement With Individual Requisite Service Period1 DeferredCompensationArrangementWithIndividualRequisiteServicePeriod1	P10Y
CY2020Q3	us-gaap	Deferred Compensation Arrangement With Individual Recorded Liability DeferredCompensationArrangementWithIndividualRecordedLiability	100000	USD
CY2020Q3	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	3300000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	2389000	USD
CY2020	us-gaap	Sublease Income SubleaseIncome	555000	USD
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	351000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	677000	USD
CY2020	us-gaap	Lease Cost LeaseCost	2862000	USD
CY2019	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	3500000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	3400000	USD
CY2019	us-gaap	Operating Leases Rent Expense Sublease Rentals1 OperatingLeasesRentExpenseSubleaseRentals1	1300000	USD
CY2018	us-gaap	Operating Leases Rent Expense Sublease Rentals1 OperatingLeasesRentExpenseSubleaseRentals1	1500000	USD
CY2020Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	5217000	USD
CY2020Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	2352000	USD
CY2020Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	3434000	USD
CY2020Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	5786000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	2581000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	2231000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	1187000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	85000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	0	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	0	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	6084000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	298000	USD
CY2020Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	5786000	USD
CY2020Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0419
CY2020Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P2Y6M18D
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	numberOfSegments
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	518499000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	517180000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	448716000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	114372000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	120812000	USD
CY2019Q4	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	134150000	USD
CY2020Q1	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	151570000	USD
CY2020Q2	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	118062000	USD
CY2020Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	114717000	USD
CY2020	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	518499000	USD
CY2019Q4	us-gaap	Gross Profit GrossProfit	21826000	USD
CY2020Q1	us-gaap	Gross Profit GrossProfit	29685000	USD
CY2020Q2	us-gaap	Gross Profit GrossProfit	21344000	USD
CY2020Q3	us-gaap	Gross Profit GrossProfit	21720000	USD
CY2020	us-gaap	Gross Profit GrossProfit	94575000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	2775000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	7421000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	3481000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	2983000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	16660000	USD
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.24
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.64
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.30
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.26
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.43
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.24
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.64
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.30
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.25
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.42
CY2020Q2	us-gaap	Restructuring Charges RestructuringCharges	1400000	USD
CY2020Q3	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	500000	USD
CY2018Q4	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	109351000	USD
CY2019Q1	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	123737000	USD
CY2019Q2	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	135588000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	148504000	USD
CY2019	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	517180000	USD
CY2018Q4	us-gaap	Gross Profit GrossProfit	14631000	USD
CY2019Q1	us-gaap	Gross Profit GrossProfit	20075000	USD
CY2019Q2	us-gaap	Gross Profit GrossProfit	23715000	USD
CY2019Q3	us-gaap	Gross Profit GrossProfit	28555000	USD
CY2019	us-gaap	Gross Profit GrossProfit	86976000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	-2695000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	958000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	5089000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	6538000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	9890000	USD
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.23
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.08
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.44
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.56
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.85
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.23
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.08
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.44
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.56
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.85
CY2019Q2	us-gaap	Insurance Recoveries InsuranceRecoveries	1000000.0	USD

Files In Submission

Name	View Source	Status
0000080420-20-000036-index-headers.html	Edgar Link	pending
0000080420-20-000036-index.html	Edgar Link	pending
0000080420-20-000036.txt	Edgar Link	pending
0000080420-20-000036-xbrl.zip	Edgar Link	pending
exhibit21110k2020.htm	Edgar Link	pending
exhibit23110k2020.htm	Edgar Link	pending
exhibit31110k2020.htm	Edgar Link	pending
exhibit31210k2020.htm	Edgar Link	pending
exhibit32110k2020.htm	Edgar Link	pending
exhibit32210k2020.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
powl-20200930.htm	Edgar Link	pending
powl-20200930.xsd	Edgar Link	pending
powl-20200930_cal.xml	Edgar Link	unprocessable
powl-20200930_def.xml	Edgar Link	unprocessable
powl-20200930_g1.jpg	Edgar Link	pending
powl-20200930_htm.xml	Edgar Link	completed
powl-20200930_lab.xml	Edgar Link	unprocessable
powl-20200930_pre.xml	Edgar Link	unprocessable
R1.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$POWL
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2020 Q3 Form 10-K Financial Statement

#000008042020000036 Filed on December 09, 2020

Income Statement

Balance Sheet

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Facts In Submission

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$POWL POWELL INDUSTRIES INC Stock $powl

2020 Q3 Form 10-K Financial Statement

#000008042020000036 Filed on December 09, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$POWL
POWELL INDUSTRIES INC Stock $powl