$GHM
GRAHAM CORP Stock $ghm

$ghm Overview Financials Valuation SEC Filings Company Website

2021 Q1 Form 10-K Financial Statement

#000156459021031421 Filed on June 02, 2021

Income Statement

Concept	2021 Q1	2020 Q2	2020 Q1
Revenue	$25.67M	$16.71M	$23.08M
YoY Change	11.22%	-18.86%	-2.36%
Cost Of Revenue	$20.69M	$15.14M	$18.64M
YoY Change	11.0%	-4.64%	-1.06%
Gross Profit	$4.981M	$1.568M	$4.442M
YoY Change	12.13%	-66.74%	-7.42%
Gross Profit Margin	19.4%	9.38%	19.24%
Selling, General & Admin	$4.380M	$3.902M	$4.020M
YoY Change	8.96%	-14.35%	-2.43%
% of Gross Profit	87.93%	248.85%	90.5%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$485.0K	$490.0K	$490.0K
YoY Change	-1.02%	0.0%	-12.5%
% of Gross Profit	9.74%	31.25%	11.03%
Operating Expenses	$4.431M	$3.902M	$4.030M
YoY Change	9.95%	-14.35%	1.26%
Operating Profit	$550.0K	-$2.334M	$412.0K
YoY Change	33.5%	-1577.22%	-49.63%
Interest Expense	$22.00K	$90.00K	$240.0K
YoY Change	-90.83%	-77.5%	-41.46%
% of Operating Profit	4.0%		58.25%
Other Income/Expense, Net
YoY Change
Pretax Income	$572.0K	-$2.190M	$650.0K
YoY Change	-12.0%	-2090.91%	-112.48%
Income Tax	$184.0K	-$372.0K	$80.00K
% Of Pretax Income	32.17%		12.31%
Net Earnings	$388.0K	-$1.818M	$576.0K
YoY Change	-32.64%	-2317.07%	-112.65%
Net Earnings / Revenue	1.51%	-10.88%	2.5%
Basic Earnings Per Share	$0.04	-$0.18	$0.06
Diluted Earnings Per Share	$0.04	-$0.18	$0.06
COMMON SHARES
Basic Shares Outstanding		9.895M	9.891M
Diluted Shares Outstanding		9.895M

Balance Sheet

Concept	2021 Q1	2020 Q2	2020 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$65.03M	$67.20M	$73.00M
YoY Change	-10.92%	-7.44%	-6.17%
Cash & Equivalents	$59.53M	$41.07M	$32.96M
Short-Term Investments	$5.500M	$26.10M	$40.00M
Other Short-Term Assets	$512.0K	$1.300M	$900.0K
YoY Change	-43.11%	-13.33%	-85.48%
Inventory	$17.33M	$22.66M	$22.29M
Prepaid Expenses
Receivables	$17.38M	$17.05M	$15.40M
Other Receivables	$0.00	$1.000M	$500.0K
Total Short-Term Assets	$120.2M	$124.8M	$126.7M
YoY Change	-5.08%	0.95%	-6.01%
LONG-TERM ASSETS
Property, Plant & Equipment	$17.62M	$17.32M	$17.59M
YoY Change	0.18%	2.89%	3.02%
Goodwill	$0.00
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$103.0K	$105.0K	$153.0K
YoY Change	-32.68%	-6.25%	2.68%
Total Long-Term Assets	$24.03M	$21.30M	$21.44M
YoY Change	12.07%	-1.84%	-0.2%
TOTAL ASSETS
Total Short-Term Assets	$120.2M	$124.8M	$126.7M
Total Long-Term Assets	$24.03M	$21.30M	$21.44M
Total Assets	$144.3M	$146.1M	$148.1M
YoY Change	-2.59%	0.53%	-5.22%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$17.97M	$9.713M	$14.25M
YoY Change	26.09%	42.9%	14.9%
Accrued Expenses	$4.628M	$3.963M	$3.352M
YoY Change	38.07%	66.37%	14.29%
Deferred Revenue	$14.06M	$31.08M	$26.98M
YoY Change	-47.9%	1.72%	-12.53%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$0.00	$0.00	$0.00
YoY Change		-100.0%	-100.0%
Total Short-Term Liabilities	$43.57M	$49.48M	$49.23M
YoY Change	-11.5%	11.08%	-10.3%
LONG-TERM LIABILITIES
Long-Term Debt	$34.00K	$100.0K	$100.0K
YoY Change	-66.0%	0.0%	0.0%
Other Long-Term Liabilities	$0.00	$1.400M	$1.400M
YoY Change	-100.0%	-6.67%	7.69%
Total Long-Term Liabilities	$0.00	$1.500M	$1.500M
YoY Change	-100.0%	-6.25%	7.14%
TOTAL LIABILITIES
Total Short-Term Liabilities	$43.57M	$49.48M	$49.23M
Total Long-Term Liabilities	$0.00	$1.500M	$1.500M
Total Liabilities	$46.35M	$51.94M	$51.40M
YoY Change	-9.82%	9.61%	-10.31%
SHAREHOLDERS EQUITY
Retained Earnings	$89.37M	$88.47M	$91.39M
YoY Change	-2.21%	-4.72%	-2.62%
Common Stock	$28.35M	$27.59M	$27.43M
YoY Change	3.34%	4.4%	4.13%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$12.39M		$12.54M
YoY Change	-1.16%		1.2%
Treasury Stock Shares	$790.0K		$808.0K
Shareholders Equity	$97.93M	$94.16M	$96.72M
YoY Change
Total Liabilities & Shareholders Equity	$144.3M	$146.1M	$148.1M
YoY Change	-2.59%	0.53%	-5.22%

Cashflow Statement

Concept	2021 Q1	2020 Q2	2020 Q1
OPERATING ACTIVITIES
Net Income	$388.0K	-$1.818M	$576.0K
YoY Change	-32.64%	-2317.07%	-112.65%
Depreciation, Depletion And Amortization	$485.0K	$490.0K	$490.0K
YoY Change	-1.02%	0.0%	-12.5%
Cash From Operating Activities	-$2.392M	-$4.373M	$5.360M
YoY Change	-144.63%	-7.99%	-558.12%
INVESTING ACTIVITIES
Capital Expenditures	-$698.0K	$338.0K	-$1.030M
YoY Change	-32.23%	14.97%	53.73%
Acquisitions
YoY Change
Other Investing Activities	$5.000K	$13.95M	$18.96M
YoY Change	-99.97%	206.59%	1796.0%
Cash From Investing Activities	-$693.0K	$13.61M	$17.93M
YoY Change	-103.87%	220.16%	5333.33%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$23.00K
YoY Change		-90.0%
Debt Paid & Issued, Net		$4.599M
YoY Change
Cash From Financing Activities	-1.104M	-1.132M	-1.100M
YoY Change	0.36%	-7.82%	27.91%
NET CHANGE
Cash From Operating Activities	-2.392M	-4.373M	5.360M
Cash From Investing Activities	-693.0K	13.61M	17.93M
Cash From Financing Activities	-1.104M	-1.132M	-1.100M
Net Change In Cash	-4.189M	8.114M	22.19M
YoY Change	-118.88%	-549.53%	-1405.29%
FREE CASH FLOW
Cash From Operating Activities	-$2.392M	-$4.373M	$5.360M
Capital Expenditures	-$698.0K	$338.0K	-$1.030M
Free Cash Flow	-$1.694M	-$4.711M	$6.390M
YoY Change	-126.51%	-6.66%	-1378.0%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
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CY2021	us-gaap	Gross Profit GrossProfit	20469000
CY2020	us-gaap	Gross Profit GrossProfit	18148000
CY2021	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	77020000
CY2021	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	17471000
CY2019	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	17878000
CY2020	us-gaap	Investment Income Interest InvestmentIncomeInterest	1324000
CY2020	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	16879000
CY2020	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	-348000
CY2019	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	-823000
CY2020	us-gaap	Other Expenses OtherExpenses	617000
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	1462000
CY2019	us-gaap	Interest Expense InterestExpense	12000
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	20 Florence Avenue
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	Batavia
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
CY2021	dei	Security12b Title Security12bTitle	Common Stock, Par Value $0.10 Per Share
CY2021	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	14020
CY2021	dei	City Area Code CityAreaCode	585
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-153000
CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
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CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-723000
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	97489000
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	90604000
CY2020	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	72456000
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-198000
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-63000
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CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1149000
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-891000
CY2020Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	32955000
CY2020Q1	us-gaap	Held To Maturity Securities Current HeldToMaturitySecuritiesCurrent	40048000
CY2020Q1	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	14592000
CY2019	ghm	Increase Decrease In Defined Benefit Plan Assets For Plan Benefits Noncurrent IncreaseDecreaseInDefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	1181000
CY2020	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-358000
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CY2021Q1	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P2Y4M28D
CY2020Q1	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P2Y9M21D
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CY2020Q1	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P1Y11M23D
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	1-8462
CY2021	dei	Local Phone Number LocalPhoneNumber	343-2216
CY2021	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	false
CY2020Q3	dei	Entity Public Float EntityPublicFloat	121846373
CY2021Q2	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	9949925
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CY2021	us-gaap	Interest Expense InterestExpense	11000
CY2020	us-gaap	Interest Expense InterestExpense	12000
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CY2020	ghm	Other Expenses And Income OtherExpensesAndIncome	15836000
CY2019	ghm	Other Expenses And Income OtherExpensesAndIncome	22054000
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3267000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2312000
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CY2021Q1	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	1557000
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CY2021Q1	us-gaap	Defined Benefit Plan Assets For Plan Benefits Noncurrent DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	6216000
CY2020Q1	us-gaap	Defined Benefit Plan Assets For Plan Benefits Noncurrent DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	3460000
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CY2020Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	153000
CY2021Q1	us-gaap	Assets Assets	144280000
CY2020Q1	us-gaap	Assets Assets	148120000
CY2021Q1	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	21000
CY2020Q1	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	40000
CY2021Q1	us-gaap	Accounts Payable Current AccountsPayableCurrent	17972000
CY2020Q1	us-gaap	Accounts Payable Current AccountsPayableCurrent	14253000
CY2021Q1	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	6106000
CY2020Q1	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	4453000
CY2021Q1	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	4628000
CY2020Q1	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	3352000
CY2021Q1	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	14059000
CY2020Q1	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	26983000
CY2021Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	46000
CY2020Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	153000
CY2021Q1	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	741000
CY2021Q1	us-gaap	Liabilities Current LiabilitiesCurrent	43573000
CY2021Q1	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	34000
CY2021Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	37000
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	11000
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	237000
CY2020	ghm	Amortization Of Unrecognized Prior Service Cost And Actuarial Losses AmortizationOfUnrecognizedPriorServiceCostAndActuarialLosses	997000
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	184000
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	6449000
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	864000
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	975000
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	1069000
CY2021	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-2000
CY2020	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	1000
CY2020	us-gaap	Gain Or Loss On Sale Of Stock In Subsidiary GainOrLossOnSaleOfStockInSubsidiary	-181000
CY2019	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	307000
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-891000
CY2019Q1	us-gaap	Stockholders Equity StockholdersEquity	98966000
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1149000
CY2019	ghm	Amortization Of Unrecognized Prior Service Cost And Actuarial Losses AmortizationOfUnrecognizedPriorServiceCostAndActuarialLosses	875000
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	77151000
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	204146000
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	32397000
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	20881000
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	4250000
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	3834000
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	23000
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-159000
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	4000
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-2044000
CY2021	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	5298000
CY2021	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-1215000
CY2021	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-416000
CY2021	ghm	Increase Decrease In Operating Lease Right Of Use Asset IncreaseDecreaseInOperatingLeaseRightOfUseAsset	-155000
CY2020	ghm	Increase Decrease In Operating Lease Right Of Use Asset IncreaseDecreaseInOperatingLeaseRightOfUseAsset	-214000
CY2021	ghm	Increase Decrease In Defined Benefit Plan Assets For Plan Benefits Noncurrent IncreaseDecreaseInDefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	841000
CY2020	ghm	Increase Decrease In Defined Benefit Plan Assets For Plan Benefits Noncurrent IncreaseDecreaseInDefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	871000
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	3556000
CY2019	ghm	Increase Decrease In Accrued Compensation Accrued Expenses And Other Current And Non Current Liabilities IncreaseDecreaseInAccruedCompensationAccruedExpensesAndOtherCurrentAndNonCurrentLiabilities	1118000
CY2019	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	6328000
CY2020	ghm	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	-140000
CY2020	ghm	Increase Decrease In Long Term Portion Of Accrued Compensation Accrued Pension Liability And Accrued Postretirement Benefits IncreaseDecreaseInLongTermPortionOfAccruedCompensationAccruedPensionLiabilityAndAccruedPostretirementBenefits	41000
CY2019	ghm	Increase Decrease In Long Term Portion Of Accrued Compensation Accrued Pension Liability And Accrued Postretirement Benefits IncreaseDecreaseInLongTermPortionOfAccruedCompensationAccruedPensionLiabilityAndAccruedPostretirementBenefits	57000
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-1722000
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1239000
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	7917000
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2158000
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2417000
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2138000
CY2021	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	7000
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	12000
CY2020	us-gaap	Proceeds From Divestiture Of Interest In Consolidated Subsidiaries ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries	602000
CY2021	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	42603000
CY2020	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	181462000
CY2019	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	115342000
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	88633000
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-28847000
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	40000
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	51000
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	97000
CY2021	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	4599000
CY2021	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	4599000
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	24000
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	307000
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	4391000
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	230000
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	146000
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-4454000
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-4507000
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-3770000
CY2021	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	356000
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	-231000
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	-183000
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	26577000
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	17382000
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-24883000
CY2020	ghm	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Within Current Assets Held For Sale CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseWithinCurrentAssetsHeldForSale	-552000
CY2019	ghm	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Within Current Assets Held For Sale CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseWithinCurrentAssetsHeldForSale	552000
CY2021	ghm	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Cash Within Current Assets Held For Sale Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingCashWithinCurrentAssetsHeldForSaleIncludingExchangeRateEffect	26577000
CY2020	ghm	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Cash Within Current Assets Held For Sale Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingCashWithinCurrentAssetsHeldForSaleIncludingExchangeRateEffect	17934000
CY2019	ghm	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Cash Within Current Assets Held For Sale Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingCashWithinCurrentAssetsHeldForSaleIncludingExchangeRateEffect	-25435000
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	32955000
CY2019Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	15021000
CY2018Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	40456000
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	59532000
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	32955000
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1069000
CY2019	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	134000
CY2019Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	15021000
CY2018Q1	us-gaap	Stockholders Equity StockholdersEquity	103349000
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	3834000
CY2019	us-gaap	Treasury Stock Value Acquired Par Value Method TreasuryStockValueAcquiredParValueMethod	146000
CY2020	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	24000
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	975000
CY2020	us-gaap	Treasury Stock Value Acquired Par Value Method TreasuryStockValueAcquiredParValueMethod	230000
CY2020	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	170000
CY2020Q1	us-gaap	Stockholders Equity StockholdersEquity	96724000
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	4533000
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	4391000
CY2021	us-gaap	Treasury Stock Value Acquired Par Value Method TreasuryStockValueAcquiredParValueMethod	23000
CY2021	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	222000
CY2021Q1	us-gaap	Stockholders Equity StockholdersEquity	97929000
CY2021	ghm	Test Of Impairment More Likelihood Percentage TestOfImpairmentMoreLikelihoodPercentage	0.50
CY2021	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	3367000
CY2020	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	3353000
CY2019	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	3538000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	2374000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	1872000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-308000
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9959000
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9876000
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9823000
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.24
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.19
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.03
CY2021	us-gaap	Net Income Loss NetIncomeLoss	2374000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	1872000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-308000
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9959000
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9876000
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9823000
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	3000
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9959000
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9879000
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9823000
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.24
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.19
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.03
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	37000
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	39000
CY2021Q1	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	635000
CY2020	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	170000
CY2019	us-gaap	Interest Paid Net InterestPaidNet	12000
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	200000
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	139000
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-73000
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-1774000
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	525000
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	348000
CY2021	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	222000
CY2021	us-gaap	Interest Paid Net InterestPaidNet	11000
CY2020	us-gaap	Interest Paid Net InterestPaidNet	12000
CY2019	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	134000
CY2021	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	173000
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	162000
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	85000
CY2021	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	0
CY2020	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	0
CY2019	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	100000
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<p style="text-align:justify;margin-top:18pt;margin-bottom:0pt;text-indent:0%;font-weight:bold;font-style:italic;font-family:Times New Roman;font-size:10pt;text-transform:none;font-variant: normal;">Use of Estimates</p> <p style="text-align:justify;margin-top:6pt;margin-bottom:0pt;text-indent:3.4%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of sales and expenses during the reporting period. Actual results could differ materially from those estimates.</p>
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1454000
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	727000
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	97489000
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	90604000
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	91831000
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	97489000
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	90604000
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	91831000
CY2021	ghm	Percentage Of Revenue From Contracts With Customers Excluding Assessed Tax Performance Obligation Satisfied At Point In Time PercentageOfRevenueFromContractsWithCustomersExcludingAssessedTaxPerformanceObligationSatisfiedAtPointInTime	0.40
CY2020	ghm	Percentage Of Revenue From Contracts With Customers Excluding Assessed Tax Performance Obligation Satisfied At Point In Time PercentageOfRevenueFromContractsWithCustomersExcludingAssessedTaxPerformanceObligationSatisfiedAtPointInTime	0.30
CY2019	ghm	Percentage Of Revenue From Contracts With Customers Excluding Assessed Tax Performance Obligation Satisfied At Point In Time PercentageOfRevenueFromContractsWithCustomersExcludingAssessedTaxPerformanceObligationSatisfiedAtPointInTime	0.40
CY2021	ghm	Percentage Of Revenue From Contracts With Customers Excluding Assessed Tax Performance Obligation Satisfied Over Time PercentageOfRevenueFromContractsWithCustomersExcludingAssessedTaxPerformanceObligationSatisfiedOverTime	0.60
CY2020	ghm	Percentage Of Revenue From Contracts With Customers Excluding Assessed Tax Performance Obligation Satisfied Over Time PercentageOfRevenueFromContractsWithCustomersExcludingAssessedTaxPerformanceObligationSatisfiedOverTime	0.70
CY2019	ghm	Percentage Of Revenue From Contracts With Customers Excluding Assessed Tax Performance Obligation Satisfied Over Time PercentageOfRevenueFromContractsWithCustomersExcludingAssessedTaxPerformanceObligationSatisfiedOverTime	0.60
CY2021Q1	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	19994000
CY2020Q1	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	14592000
CY2021	ghm	Change In Contract With Customer Asset ChangeInContractWithCustomerAsset	5402000
CY2021Q1	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	14059000
CY2020Q1	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	26983000
CY2021	ghm	Change In Contract With Customer Liability ChangeInContractWithCustomerLiability	-12924000
CY2021Q1	ghm	Contract With Customer Net Asset Liability Current ContractWithCustomerNetAssetLiabilityCurrent	5935000
CY2020Q1	ghm	Contract With Customer Net Asset Liability Current ContractWithCustomerNetAssetLiabilityCurrent	-12391000
CY2021	ghm	Change In Contract With Customer Asset Liability Net ChangeInContractWithCustomerAssetLiabilityNet	18326000
CY2021	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	20833000
CY2021	ghm	Change In Contract With Customer Asset ChangeInContractWithCustomerAsset	5402000
CY2021	us-gaap	Contract With Customer Asset Cumulative Catch Up Adjustment To Revenue Change In Measure Of Progress ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress	29836000
CY2021	us-gaap	Contract With Customer Asset Reclassified To Receivable ContractWithCustomerAssetReclassifiedToReceivable	24434000
CY2021	ghm	Change In Contract With Customer Liability ChangeInContractWithCustomerLiability	-12924000
CY2021	ghm	Contract With Customer Liability Consideration Received ContractWithCustomerLiabilityConsiderationReceived	7909000
CY2021Q1	ghm	Contract With Customer Receivables Billed But Not Paid Under Retainage ContractWithCustomerReceivablesBilledButNotPaidUnderRetainage	3747000
CY2020Q1	ghm	Contract With Customer Receivables Billed But Not Paid Under Retainage ContractWithCustomerReceivablesBilledButNotPaidUnderRetainage	2016000
CY2021Q1	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	137567000
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	6449000
CY2021Q1	us-gaap	Inventory Raw Materials InventoryRawMaterials	3490000
CY2020Q1	us-gaap	Inventory Raw Materials InventoryRawMaterials	3061000
CY2021Q1	us-gaap	Inventory Work In Process InventoryWorkInProcess	12196000
CY2020Q1	us-gaap	Inventory Work In Process InventoryWorkInProcess	18018000
CY2021Q1	us-gaap	Inventory Finished Goods InventoryFinishedGoods	1646000
CY2020Q1	us-gaap	Inventory Finished Goods InventoryFinishedGoods	1212000
CY2021Q1	us-gaap	Inventory Net InventoryNet	17332000
CY2020Q1	us-gaap	Inventory Net InventoryNet	22291000
CY2021Q1	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	53087000
CY2020Q1	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	51398000
CY2021Q1	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	35469000
CY2020Q1	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	33811000
CY2021Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	17618000
CY2020Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	17587000
CY2021	us-gaap	Depreciation Depreciation	1945000
CY2020	us-gaap	Depreciation Depreciation	1957000
CY2019	us-gaap	Depreciation Depreciation	1968000
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	6449000
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	1222000
CY2020Q1	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	359000
CY2019Q1	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	366000
CY2021	us-gaap	Product Warranty Expense ProductWarrantyExpense	344000
CY2020	us-gaap	Product Warranty Expense ProductWarrantyExpense	62000
CY2021	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	77000
CY2020	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	69000
CY2021Q1	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	626000
CY2020Q1	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	359000
CY2021	ghm	Lessee Operating Lease And Finance Lease Option To Renew Or Terminate LesseeOperatingLeaseAndFinanceLeaseOptionToRenewOrTerminate	Certain leases include options to renew or terminate. Renewal options are exercisable per the discretion of the Company and vary based on the nature of each lease.
CY2020Q1	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0549
CY2021Q1	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.1071
CY2020Q1	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0971
CY2021Q1	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0549
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	22000
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	48000
CY2021	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	8000
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	12000
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	165000
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	229000
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	11000
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	38000
CY2021	us-gaap	Lease Cost LeaseCost	206000
CY2020	us-gaap	Lease Cost LeaseCost	327000
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	49000
CY2021Q1	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	26000
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	31000
CY2021Q1	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	26000
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	8000
CY2021Q1	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	11000
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	88000
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	322000
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	62000
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	176000
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	223000
CY2021Q1	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	63000
CY2021Q1	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	5000
CY2021Q1	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	8000
CY2021Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	83000
CY2021Q1	us-gaap	Finance Lease Liability FinanceLeaseLiability	55000
CY2021Q1	us-gaap	Short Term Borrowings ShortTermBorrowings	0
CY2020Q1	us-gaap	Short Term Borrowings ShortTermBorrowings	0
CY2021Q1	us-gaap	Finance Lease Liability FinanceLeaseLiability	55000
CY2020Q1	us-gaap	Finance Lease Liability FinanceLeaseLiability	95000
CY2021Q1	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	21000
CY2020Q1	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	40000
CY2021Q1	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	34000
CY2020Q1	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	55000
CY2021Q1	us-gaap	Long Term Debt LongTermDebt	0
CY2021Q1	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	11567000
CY2020Q1	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	13328000
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3267000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2312000
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-145000
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	924000
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	547000
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	181000
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	141000
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	468000
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	55000
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-960000
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-694000
CY2021	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	-7000
CY2020	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	-411000
CY2019	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	-3877000
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-561000
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-287000
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-159000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	893000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	440000
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-3993000
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-116000
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	8000
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-84000
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	508000
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-12000
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	41000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	163000
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	686000
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	486000
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-30000
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-35000
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	120000
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	45000
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	158000
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	89000
CY2021	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	172000
CY2020	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	211000
CY2019	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	177000
CY2021	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	7000
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	411000
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	3877000
CY2021	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	156000
CY2020	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-1000
CY2019	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	3000
CY2019	ghm	Income Tax Reconciliation Impairment Of Goodwill And Intangible Assets IncomeTaxReconciliationImpairmentOfGoodwillAndIntangibleAssets	257000
CY2021	us-gaap	Income Tax Reconciliation Tax Credits Foreign IncomeTaxReconciliationTaxCreditsForeign	84000
CY2021	ghm	Income Tax Reconciliation Foreign Derived Intangible Income Deduction IncomeTaxReconciliationForeignDerivedIntangibleIncomeDeduction	81000
CY2020	ghm	Income Tax Reconciliation Foreign Derived Intangible Income Deduction IncomeTaxReconciliationForeignDerivedIntangibleIncomeDeduction	95000
CY2019	ghm	Income Tax Reconciliation Foreign Derived Intangible Income Deduction IncomeTaxReconciliationForeignDerivedIntangibleIncomeDeduction	69000
CY2021	ghm	Income Tax Reconciliation Global Intangible Low Taxed Income IncomeTaxReconciliationGlobalIntangibleLowTaxedIncome	405000
CY2020	ghm	Income Tax Reconciliation Global Intangible Low Taxed Income IncomeTaxReconciliationGlobalIntangibleLowTaxedIncome	-1000
CY2019	ghm	Income Tax Reconciliation Global Intangible Low Taxed Income IncomeTaxReconciliationGlobalIntangibleLowTaxedIncome	11000
CY2021	ghm	Income Tax Reconciliation Net Operating Loss Carryback IncomeTaxReconciliationNetOperatingLossCarryback	146000
CY2020	ghm	Income Tax Reconciliation Capital Loss From Sale Of Energy Steel IncomeTaxReconciliationCapitalLossFromSaleOfEnergySteel	325000
CY2019	ghm	Income Tax Reconciliation Capital Loss From Sale Of Energy Steel IncomeTaxReconciliationCapitalLossFromSaleOfEnergySteel	3848000
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1000
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	1000
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	5000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	893000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	440000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	163000
CY2021Q1	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1772000
CY2020Q1	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1707000
CY2021Q1	ghm	Deferred Tax Assets Tax Deferred Expense Accrued Compensation DeferredTaxAssetsTaxDeferredExpenseAccruedCompensation	147000
CY2020Q1	ghm	Deferred Tax Assets Tax Deferred Expense Accrued Compensation DeferredTaxAssetsTaxDeferredExpenseAccruedCompensation	206000
CY2021	us-gaap	Defined Benefit Plan Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate	2026
CY2021Q1	ghm	Deferred Tax Assets And Liabilities Prepaid Pension Cost DeferredTaxAssetsAndLiabilitiesPrepaidPensionCost	1386000
CY2020Q1	ghm	Deferred Tax Assets And Liabilities Prepaid Pension Cost DeferredTaxAssetsAndLiabilitiesPrepaidPensionCost	783000
CY2021Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	347000
CY2020Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	169000
CY2021Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	131000
CY2020Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	143000
CY2021Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Compensated Absences DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsCompensatedAbsences	435000
CY2020Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Compensated Absences DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsCompensatedAbsences	402000
CY2021Q1	ghm	Deferred Tax Assets Liabilities Inventory DeferredTaxAssetsLiabilitiesInventory	462000
CY2020Q1	ghm	Deferred Tax Assets Liabilities Inventory DeferredTaxAssetsLiabilitiesInventory	-13000
CY2021Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves	140000
CY2020Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves	81000
CY2021Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	585000
CY2020Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	366000
CY2021Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	337000
CY2020Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	385000
CY2021Q1	ghm	Deferred Tax Assets Operating Lease Assets DeferredTaxAssetsOperatingLeaseAssets	22000
CY2020Q1	ghm	Deferred Tax Assets Operating Lease Assets DeferredTaxAssetsOperatingLeaseAssets	58000
CY2021Q1	ghm	Deferred Tax Assets Operating Lease Liabilities DeferredTaxAssetsOperatingLeaseLiabilities	23000
CY2020Q1	ghm	Deferred Tax Assets Operating Lease Liabilities DeferredTaxAssetsOperatingLeaseLiabilities	60000
CY2021Q1	ghm	Deferred Tax Assets Tax Deferred Expense State Investment Tax Credit DeferredTaxAssetsTaxDeferredExpenseStateInvestmentTaxCredit	1115000
CY2020Q1	ghm	Deferred Tax Assets Tax Deferred Expense State Investment Tax Credit DeferredTaxAssetsTaxDeferredExpenseStateInvestmentTaxCredit	1108000
CY2020Q1	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	75000
CY2021Q1	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	4211000
CY2020Q1	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	4211000
CY2021Q1	ghm	Deferred Tax Assets Liabilities Other DeferredTaxAssetsLiabilitiesOther	62000
CY2020Q1	ghm	Deferred Tax Assets Liabilities Other DeferredTaxAssetsLiabilitiesOther	-1000
CY2021Q1	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	4691000
CY2020Q1	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	4646000
CY2021Q1	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	5326000
CY2020Q1	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	5319000
CY2020Q1	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	673000
CY2021Q1	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	5326000
CY2020Q1	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	5319000
CY2021Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0
CY2020Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0
CY2020Q1	ghm	Percentage Of Business Interest Limitation PercentageOfBusinessInterestLimitation	0.30
CY2020Q1	ghm	Percentage Of Business Interest Limitation PercentageOfBusinessInterestLimitation	0.50
CY2021	ghm	Defined Benefit Plan Additional Disclosures About Service And Average Earnings For Calculation Of Benefits DefinedBenefitPlanAdditionalDisclosuresAboutServiceAndAverageEarningsForCalculationOfBenefits	five highest consecutive calendar years of compensation in the ten-year period preceding retirement
CY2021Q1	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	32861000
CY2020Q1	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	31715000
CY2021Q1	us-gaap	Defined Benefit Plan Weighted Average Asset Allocations DefinedBenefitPlanWeightedAverageAssetAllocations	1
CY2020Q1	us-gaap	Defined Benefit Plan Weighted Average Asset Allocations DefinedBenefitPlanWeightedAverageAssetAllocations	1
CY2021	ghm	Description Of Employer Matching Contribution To Four Hundred One K Plan DescriptionOfEmployerMatchingContributionToFourHundredOneKPlan	matching contributions equal to 100% of the first 3% of an employee's salary deferral and 50% of the next 2% percent of an employee’s salary deferral
CY2021	ghm	Defined Contribution Plan Employer Matching Percent On First Three Percent Employee Salary Deferral DefinedContributionPlanEmployerMatchingPercentOnFirstThreePercentEmployeeSalaryDeferral	1
CY2021	ghm	Defined Contribution Plan Salary Deferral Percentage That Receives Equivalent Company Match DefinedContributionPlanSalaryDeferralPercentageThatReceivesEquivalentCompanyMatch	0.03
CY2021	ghm	Defined Additional Contribution Plan Employer Matching Contribution Percent DefinedAdditionalContributionPlanEmployerMatchingContributionPercent	0.50
CY2021	ghm	Defined Contribution Plan Salary Deferral Percentage That Receives Additional Company Match DefinedContributionPlanSalaryDeferralPercentageThatReceivesAdditionalCompanyMatch	0.02
CY2021Q1	ghm	Company Share Of Medical Premium Cost For Early Retiree Family Coverage Under Other Postretirement Plan CompanyShareOfMedicalPremiumCostForEarlyRetireeFamilyCoverageUnderOtherPostretirementPlan	4000
CY2021Q1	ghm	Company Share Of Medical Premium Cost For Early Retiree Single Coverage Under Other Postretirement Plan CompanyShareOfMedicalPremiumCostForEarlyRetireeSingleCoverageUnderOtherPostretirementPlan	2000
CY2021Q1	ghm	Company Share Of Medical Premium Cost For Regular Retiree Coverage Under Other Postretirement Plan CompanyShareOfMedicalPremiumCostForRegularRetireeCoverageUnderOtherPostretirementPlan	1000
CY2021Q1	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate1 DefinedBenefitPlanUltimateHealthCareCostTrendRate1	0.045
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	18.92
CY2021	ghm	Defined Benefit Plan Decrement In Health Care Cost Trend Rate DefinedBenefitPlanDecrementInHealthCareCostTrendRate	0.005
CY2021Q1	ghm	Accrued Postretirement Benefit Liability Current AccruedPostretirementBenefitLiabilityCurrent	72000
CY2020Q1	ghm	Accrued Postretirement Benefit Liability Current AccruedPostretirementBenefitLiabilityCurrent	77000
CY2021	ghm	Specific Stop Loss Insurance Coverage Per Employee1 SpecificStopLossInsuranceCoveragePerEmployee1	100
CY2021	ghm	Aggregate Stop Loss Insurance Coverage Per Employee AggregateStopLossInsuranceCoveragePerEmployee	1000
CY2021Q1	ghm	Annual Plan Aggregate Stop Loss Insurance Coverage AnnualPlanAggregateStopLossInsuranceCoverage	2744000
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P1Y25D
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	37000
CY2021Q1	ghm	Self Insured Medical Plan Liability SelfInsuredMedicalPlanLiability	184000
CY2020Q1	ghm	Self Insured Medical Plan Liability SelfInsuredMedicalPlanLiability	124000
CY2021	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	0
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	24000
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	307000
CY2018Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	69000
CY2018Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	20.26
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	19000
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	15.89
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	11000
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	33.02
CY2019Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	39000
CY2019Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	18.76
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	2000
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	15.25
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	37000
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	18.92
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	37000
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	18.92
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P1Y25D
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	37000
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	18.92
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P1Y25D
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	0
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	10000
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	161000
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	453000
CY2020	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	-1494000
CY2020	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-771000
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-723000
CY2021	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	1331000
CY2021	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-828000
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	2159000
CY2021Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.04
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.24
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1
CY2015Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	18000000
CY2021	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	0
CY2020	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	0
CY2019	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	0
CY2020Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	16710000
CY2020Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	27954000
CY2020Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	27154000
CY2021Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	25671000
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	97489000
CY2020Q2	us-gaap	Gross Profit GrossProfit	1568000
CY2020Q3	us-gaap	Gross Profit GrossProfit	7693000
CY2020Q4	us-gaap	Gross Profit GrossProfit	6227000
CY2021Q1	us-gaap	Gross Profit GrossProfit	4981000
CY2021	us-gaap	Gross Profit GrossProfit	20469000
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	-1818000
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	2744000
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	1060000
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	388000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	2374000
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.18
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.27
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.11
CY2021Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.04
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.24
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.18
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.27
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.11
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.01
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.19
CY2019Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	20593000
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	21643000
CY2019Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	25286000
CY2020Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	23082000
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	90604000
CY2019Q2	us-gaap	Gross Profit GrossProfit	4714000
CY2019Q3	us-gaap	Gross Profit GrossProfit	4948000
CY2019Q4	us-gaap	Gross Profit GrossProfit	4044000
CY2020Q1	us-gaap	Gross Profit GrossProfit	4442000
CY2020	us-gaap	Gross Profit GrossProfit	18148000
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	82000
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	1205000
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	9000
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	576000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	1872000
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.01
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.12
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.06
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.12
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.06
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.19

Files In Submission

Name	View Source	Status
0001564590-21-031421-index-headers.html	Edgar Link	pending
0001564590-21-031421-index.html	Edgar Link	pending
0001564590-21-031421.txt	Edgar Link	pending
0001564590-21-031421-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
ghm-10k_20210331.htm	Edgar Link	pending
ghm-10k_20210331_htm.xml	Edgar Link	completed
ghm-20210331.xsd	Edgar Link	pending
ghm-20210331_cal.xml	Edgar Link	unprocessable
ghm-20210331_def.xml	Edgar Link	unprocessable
ghm-20210331_lab.xml	Edgar Link	unprocessable
ghm-20210331_pre.xml	Edgar Link	unprocessable
ghm-ex211_11.htm	Edgar Link	pending
ghm-ex231_9.htm	Edgar Link	pending
ghm-ex311_6.htm	Edgar Link	pending
ghm-ex312_7.htm	Edgar Link	pending
ghm-ex321_10.htm	Edgar Link	pending
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report.css	Edgar Link	pending
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$GHM
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2021 Q1 Form 10-K Financial Statement

#000156459021031421 Filed on June 02, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GHM GRAHAM CORP Stock $ghm

2021 Q1 Form 10-K Financial Statement

#000156459021031421 Filed on June 02, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GHM
GRAHAM CORP Stock $ghm