$ZYXI
ZYNEX INC

2021 Q4 Form 10-K Financial Statement

#000141057822000453 Filed on March 22, 2022

View on sec.gov

Income Statement

Concept 2021 Q4 2021 Q3 2021
Revenue $40.37M $34.79M $130.3M
YoY Change 57.65% 73.7% 62.63%
Cost Of Revenue $7.331M $6.837M $27.32M
YoY Change 29.52% 59.15% 56.86%
Gross Profit $33.03M $27.95M $103.0M
YoY Change 65.59% 77.67% 64.23%
Gross Profit Margin 81.84% 80.34% 79.03%
Selling, General & Admin $21.45M $19.90M $80.61M
YoY Change 21.52% 38.98% 53.68%
% of Gross Profit 64.93% 71.21% 78.28%
Research & Development $2.600M
YoY Change 225.0%
% of Gross Profit 2.52%
Depreciation & Amortization $597.0K $595.0K $2.261M
YoY Change 12.64% 19.0% 43.83%
% of Gross Profit 1.81% 2.13% 2.2%
Operating Expenses $21.45M $19.90M $83.21M
YoY Change 21.52% 38.98% 56.25%
Operating Profit $11.59M $8.046M $22.37M
YoY Change 404.44% 471.04% 118.23%
Interest Expense -$23.00K -$18.00K -$95.00K
YoY Change 130.0% 80.0% 375.0%
% of Operating Profit -0.2% -0.22% -0.42%
Other Income/Expense, Net -$18.00K -$95.00K
YoY Change 260.0% -1.04%
Pretax Income $11.56M $8.028M $22.27M
YoY Change 420.86% 471.79% 119.35%
Income Tax $2.669M $1.900M $5.168M
% Of Pretax Income 23.08% 23.67% 23.21%
Net Earnings $8.894M $6.107M $17.10M
YoY Change 397.71% 358.14% 88.48%
Net Earnings / Revenue 22.03% 17.56% 13.13%
Basic Earnings Per Share $0.18 $0.45
Diluted Earnings Per Share $225.9K $0.17 $0.44
COMMON SHARES
Basic Shares Outstanding 34.78M 34.77M 38.32M
Diluted Shares Outstanding 35.49M 39.20M

Balance Sheet

Concept 2021 Q4 2021 Q3 2021
SHORT-TERM ASSETS
Cash & Short-Term Investments $42.61M $35.37M $42.61M
YoY Change 8.79% -14.22% 8.79%
Cash & Equivalents $42.61M $35.37M
Short-Term Investments
Other Short-Term Assets $689.0K $1.102M $689.0K
YoY Change -50.07% 3.96% -50.07%
Inventory $10.76M $9.154M $10.76M
Prepaid Expenses
Receivables $28.63M $24.23M $28.63M
Other Receivables $0.00 $0.00 $0.00
Total Short-Term Assets $82.69M $69.86M $82.69M
YoY Change 31.2% 21.38% 31.21%
LONG-TERM ASSETS
Property, Plant & Equipment $2.186M $2.253M $18.91M
YoY Change 13.56% 34.91% 129.53%
Goodwill $20.40M
YoY Change
Intangibles $9.975M
YoY Change
Long-Term Investments
YoY Change
Other Assets $1.296M $960.0K $1.296M
YoY Change 42.42% -24.41% 42.42%
Total Long-Term Assets $50.59M $20.87M $50.59M
YoY Change 452.72% 181.5% 452.24%
TOTAL ASSETS
Total Short-Term Assets $82.69M $69.86M $82.69M
Total Long-Term Assets $50.59M $20.87M $50.59M
Total Assets $133.3M $90.72M $133.3M
YoY Change 84.65% 39.65% 84.64%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable $4.739M $2.669M $4.739M
YoY Change 0.4% 1.48% 0.4%
Accrued Expenses $6.756M $5.931M $6.756M
YoY Change 34.05% 41.55% 34.05%
Deferred Revenue
YoY Change
Short-Term Debt $5.333M $0.00 $0.00
YoY Change
Long-Term Debt Due $5.333M $115.0K $5.451M
YoY Change 6566.25% 130.0% 6713.75%
Total Short-Term Liabilities $22.87M $10.29M $22.87M
YoY Change 126.07% 41.08% 126.0%
LONG-TERM LIABILITIES
Long-Term Debt $10.61M $347.0K $10.92M
YoY Change 3687.5% 104.12% 3800.71%
Other Long-Term Liabilities $25.56M $16.70M $25.56M
YoY Change 419.43% 409.18% 419.43%
Total Long-Term Liabilities $10.61M $17.05M $36.48M
YoY Change 103.94% 394.14% 601.5%
TOTAL LIABILITIES
Total Short-Term Liabilities $22.87M $10.29M $22.87M
Total Long-Term Liabilities $10.61M $17.05M $36.48M
Total Liabilities $59.35M $27.34M $59.35M
YoY Change 287.4% 154.49% 287.4%
SHAREHOLDERS EQUITY
Retained Earnings $0.00 $31.64M
YoY Change -100.0% 46.19%
Common Stock $80.44M $38.26M
YoY Change 115.82% 4.77%
Preferred Stock
YoY Change
Treasury Stock (at cost) $6.513M $6.513M
YoY Change 69.34% 69.34%
Treasury Stock Shares $1.246M $1.246M
Shareholders Equity $73.93M $63.38M $73.93M
YoY Change
Total Liabilities & Shareholders Equity $133.3M $90.72M $133.3M
YoY Change 84.65% 39.65% 84.64%

Cashflow Statement

Concept 2021 Q4 2021 Q3 2021
OPERATING ACTIVITIES
Net Income $8.894M $6.107M $17.10M
YoY Change 397.71% 358.14% 88.48%
Depreciation, Depletion And Amortization $597.0K $595.0K $2.261M
YoY Change 12.64% 19.0% 43.83%
Cash From Operating Activities $7.538M $3.689M $6.949M
YoY Change -546.04% -579.09% 749.51%
INVESTING ACTIVITIES
Capital Expenditures -$189.0K -$66.00K $609.0K
YoY Change -17.83% -40.0% -38.17%
Acquisitions $16.00M
YoY Change
Other Investing Activities -$16.00M -$16.00M
YoY Change
Cash From Investing Activities -$16.19M -$66.00K -$16.61M
YoY Change 6937.39% -40.0% 1585.89%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net $2.667M
YoY Change -89.42%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities 15.89M -585.0K 13.10M
YoY Change -12324.62% -102.32% -48.24%
NET CHANGE
Cash From Operating Activities 7.538M 3.689M 6.949M
Cash From Investing Activities -16.19M -66.00K -16.61M
Cash From Financing Activities 15.89M -585.0K 13.10M
Net Change In Cash 7.244M 3.038M 3.439M
YoY Change -453.37% -87.5% -86.32%
FREE CASH FLOW
Cash From Operating Activities $7.538M $3.689M $6.949M
Capital Expenditures -$189.0K -$66.00K $609.0K
Free Cash Flow $7.727M $3.755M $6.340M
YoY Change -629.25% -668.94% -3896.41%

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CY2021 us-gaap Right Of Use Asset Obtained In Exchange For Finance Lease Liability
RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability
175000
CY2020 us-gaap Right Of Use Asset Obtained In Exchange For Finance Lease Liability
RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability
225000
CY2021 zyxi Inventory Transferred To Property And Equipment Under Lease
InventoryTransferredToPropertyAndEquipmentUnderLease
1587000
CY2020Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
39173000
CY2021 us-gaap Interest Paid Net
InterestPaidNet
82000
CY2020 us-gaap Interest Paid Net
InterestPaidNet
19000
CY2021 zyxi Rent Paid
RentPaid
-2109000
CY2020 zyxi Rent Paid
RentPaid
-1633000
CY2021 us-gaap Income Taxes Paid Net
IncomeTaxesPaidNet
-3305000
CY2020 us-gaap Income Taxes Paid Net
IncomeTaxesPaidNet
-894000
CY2020 us-gaap Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
25300000
CY2021 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
3439000
CY2020 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
25133000
CY2020Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
39173000
CY2019Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
14040000
CY2021Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
42612000
CY2020 zyxi Inventory Transferred To Property And Equipment Under Lease
InventoryTransferredToPropertyAndEquipmentUnderLease
811000
CY2021 zyxi Capital Expenditures Not Yet Paid
CapitalExpendituresNotYetPaid
47000
CY2021Q4 us-gaap Dividends Payable Current And Noncurrent
DividendsPayableCurrentAndNoncurrent
3622000
CY2021Q4 us-gaap Business Combination Contingent Consideration Liability
BusinessCombinationContingentConsiderationLiability
9700000
CY2021 us-gaap Stock Issued1
StockIssued1
4701000
CY2021 us-gaap Stock Issued During Period Value Stock Dividend
StockIssuedDuringPeriodValueStockDividend
36911000
CY2019Q4 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
19653000
CY2020 zyxi Stock Issued For Public Offering
StockIssuedForPublicOffering
-25203000
CY2020 zyxi Stock Issued During Period Value Stock Based Awards Exercised And Vested
StockIssuedDuringPeriodValueStockBasedAwardsExercisedAndVested
567000
CY2020 us-gaap Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition
AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition
2681000
CY2020 zyxi Shares With Held To Pay Tax Withholding For Share Based Compensation
SharesWithHeldToPayTaxWithholdingForShareBasedCompensation
412000
CY2020 us-gaap Noncontrolling Interest Increase From Subsidiary Equity Issuance
NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance
89000
CY2020 us-gaap Profit Loss
ProfitLoss
9074000
CY2020Q4 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
56855000
CY2021 zyxi Stock Issued During Period Value Stock Based Awards Exercised And Vested
StockIssuedDuringPeriodValueStockBasedAwardsExercisedAndVested
161000
CY2021 us-gaap Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition
AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition
1630000
CY2021 zyxi Shares With Held To Pay Tax Withholding For Share Based Compensation
SharesWithHeldToPayTaxWithholdingForShareBasedCompensation
236000
CY2021 us-gaap Stock Repurchased During Period Value
StockRepurchasedDuringPeriodValue
2667000
CY2021 us-gaap Stock Issued During Period Value Acquisitions
StockIssuedDuringPeriodValueAcquisitions
4701000
CY2021 zyxi Cash Dividends Per Share Declared
CashDividendsPerShareDeclared
0.10
CY2021 us-gaap Dividends
Dividends
3622000
CY2021 us-gaap Profit Loss
ProfitLoss
17103000
CY2021Q4 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
73925000
CY2021Q4 zyxi Percentage Of Dividend Declared
PercentageOfDividendDeclared
0.10
CY2021 us-gaap Use Of Estimates
UseOfEstimates
<p style="font-family:'Times New Roman','Times','serif';font-size:10pt;font-weight:bold;margin:0pt 0pt 12pt 0pt;"><b style="font-weight:bold;text-decoration-line:underline;text-decoration-style:solid;">Use of Estimates</b></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 12pt 0pt;">Preparation of financial statements in conformity with generally accepted accounting principles in the United States of America (“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 the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. The most significant management estimates used in the preparation of the accompanying consolidated financial statements are associated with the expected net collectable value of its accounts receivable and related revenue, inventory reserves, the life of its leased unit devices, stock-based compensation, and valuation of long-lived assets acquired in business combinations and realizability of deferred tax assets.</p>
CY2021Q4 us-gaap Inventory Raw Materials And Supplies
InventoryRawMaterialsAndSupplies
4471000
CY2020Q4 us-gaap Inventory Raw Materials And Supplies
InventoryRawMaterialsAndSupplies
3213000
CY2021Q4 us-gaap Inventory Work In Process
InventoryWorkInProcess
345000
CY2020Q4 us-gaap Inventory Work In Process
InventoryWorkInProcess
1455000
CY2021Q4 us-gaap Inventory Finished Goods
InventoryFinishedGoods
4468000
CY2020Q4 us-gaap Inventory Finished Goods
InventoryFinishedGoods
4119000
CY2021Q4 us-gaap Other Inventory In Transit
OtherInventoryInTransit
1624000
CY2021Q4 us-gaap Inventory Gross
InventoryGross
10908000
CY2020Q4 us-gaap Inventory Gross
InventoryGross
8787000
CY2021Q4 us-gaap Inventory Lifo Reserve
InventoryLIFOReserve
152000
CY2020Q4 us-gaap Inventory Lifo Reserve
InventoryLIFOReserve
152000
CY2021Q4 us-gaap Inventory Net
InventoryNet
10756000
CY2020Q4 us-gaap Inventory Net
InventoryNet
8635000
CY2021 us-gaap Lessee Operating Lease Existence Of Option To Extend
LesseeOperatingLeaseExistenceOfOptionToExtend
true
CY2021 us-gaap Lessee Operating Lease Existence Of Option To Terminate
LesseeOperatingLeaseExistenceOfOptionToTerminate
true
CY2021 us-gaap Finite Lived Intangible Asset Useful Life
FiniteLivedIntangibleAssetUsefulLife
P11Y
CY2021 zyxi Transaction Costs
TransactionCosts
300000
CY2021 us-gaap Net Income Loss
NetIncomeLoss
17103000
CY2020 us-gaap Net Income Loss
NetIncomeLoss
9074000
CY2021 us-gaap Research And Development Expense
ResearchAndDevelopmentExpense
2600000
CY2020 us-gaap Research And Development Expense
ResearchAndDevelopmentExpense
800000
CY2021Q4 zyxi Percentage Of Dividend Declared
PercentageOfDividendDeclared
0.10
CY2021 us-gaap Finite Lived Intangible Asset Useful Life
FiniteLivedIntangibleAssetUsefulLife
P11Y
CY2021 us-gaap Business Acquisitions Pro Forma Revenue
BusinessAcquisitionsProFormaRevenue
130811000
CY2020 us-gaap Business Acquisitions Pro Forma Revenue
BusinessAcquisitionsProFormaRevenue
80414000
CY2021 us-gaap Business Acquisitions Pro Forma Net Income Loss
BusinessAcquisitionsProFormaNetIncomeLoss
16404000
CY2020 us-gaap Business Acquisitions Pro Forma Net Income Loss
BusinessAcquisitionsProFormaNetIncomeLoss
7568000
CY2021Q4 us-gaap Property Plant And Equipment Gross
PropertyPlantAndEquipmentGross
4828000
CY2020Q4 us-gaap Property Plant And Equipment Gross
PropertyPlantAndEquipmentGross
4432000
CY2021Q4 us-gaap Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
2642000
CY2020Q4 us-gaap Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
2507000
CY2021Q4 us-gaap Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
2186000
CY2020Q4 us-gaap Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
1925000
CY2021Q4 us-gaap Goodwill
Goodwill
20400000
CY2021 us-gaap Asset Impairment Charges
AssetImpairmentCharges
0
CY2021Q4 us-gaap Finite Lived Intangible Assets Amortization Expense Next Twelve Months
FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
908000
CY2021Q4 us-gaap Finite Lived Intangible Assets Amortization Expense Year Two
FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
908000
CY2021Q4 us-gaap Finite Lived Intangible Assets Amortization Expense Year Three
FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
911000
CY2021Q4 us-gaap Long Term Debt Maturities Repayments Of Principal In Next Twelve Months
LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
5333000
CY2021Q4 us-gaap Long Term Debt Maturities Repayments Of Principal In Year Two
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
5333000
CY2021Q4 us-gaap Long Term Debt Maturities Repayments Of Principal In Year Three
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
5334000
CY2021Q4 us-gaap Debt Instrument Carrying Amount
DebtInstrumentCarryingAmount
16000000
CY2021Q4 us-gaap Finite Lived Intangible Assets Amortization Expense Year Four
FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
908000
CY2021Q4 us-gaap Finite Lived Intangible Assets Amortization Expense Year Five
FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
908000
CY2021Q4 us-gaap Finite Lived Intangible Assets Amortization Expense After Year Five
FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
5432000
CY2021Q4 us-gaap Finite Lived Intangible Assets Net
FiniteLivedIntangibleAssetsNet
9975000
CY2021 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
38317000
CY2020 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
37256000
CY2021 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
0.45
CY2020 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
0.24
CY2021 us-gaap Net Income Loss
NetIncomeLoss
17103000
CY2020 us-gaap Net Income Loss
NetIncomeLoss
9074000
CY2021 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
38317000
CY2020 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
37256000
CY2021 us-gaap Weighted Average Number Diluted Shares Outstanding Adjustment
WeightedAverageNumberDilutedSharesOutstandingAdjustment
880000
CY2020 us-gaap Weighted Average Number Diluted Shares Outstanding Adjustment
WeightedAverageNumberDilutedSharesOutstandingAdjustment
1182000
CY2021 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
39197000
CY2020 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
38438000
CY2021 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
0.44
CY2020 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
0.24
CY2021 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
1.17
CY2021 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
0.0159
CY2021 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
0
CY2021Q4 us-gaap Long Term Debt Current
LongTermDebtCurrent
5333000
CY2021Q4 zyxi Debt Issuance Cost Net
DebtIssuanceCostNet
62000
CY2021Q4 us-gaap Long Term Debt Noncurrent
LongTermDebtNoncurrent
10605000
CY2021 zyxi Schedule Of Outstanding And Exercisable Number Of Options
ScheduleOfOutstandingAndExercisableNumberOfOptions
<p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><span style="margin-bottom:12pt;visibility:hidden;">​</span></p><table style="border-collapse:collapse;font-size:16pt;height:max-content;padding-left:0pt;padding-right:0pt;width:100%;"><tr style="height:1pt;"><td style="vertical-align:bottom;width:56.52%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="bottom:0pt;position:absolute;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;"><span style="font-size:1pt;visibility:hidden;">​</span></p></div></div></td><td style="vertical-align:bottom;white-space:nowrap;width:1.48%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="bottom:0pt;position:absolute;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;"><span style="font-size:1pt;visibility:hidden;">​</span></p></div></div></td><td style="vertical-align:bottom;white-space:nowrap;width:20.54%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="bottom:0pt;position:absolute;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;"><span style="font-size:1pt;visibility:hidden;">​</span></p></div></div></td><td style="vertical-align:bottom;white-space:nowrap;width:1.48%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="bottom:0pt;position:absolute;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;"><span style="font-size:1pt;visibility:hidden;">​</span></p></div></div></td><td style="vertical-align:bottom;white-space:nowrap;width:1.4%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="bottom:0pt;position:absolute;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;"><span style="font-size:1pt;visibility:hidden;">​</span></p></div></div></td><td style="vertical-align:bottom;white-space:nowrap;width:18.55%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="bottom:0pt;position:absolute;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;"><span style="font-size:1pt;visibility:hidden;">​</span></p></div></div></td></tr><tr><td style="vertical-align:bottom;width:56.52%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;"><span style="font-size:8pt;visibility:hidden;">​</span></p></td><td style="vertical-align:bottom;white-space:nowrap;width:1.48%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:8pt;text-align:center;margin:0pt 0pt 0.05pt 0pt;"><b style="font-weight:bold;">    </b></p></td><td style="vertical-align:bottom;white-space:nowrap;width:20.54%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:8pt;text-align:center;margin:0pt 0pt 0.05pt 0pt;"><b style="font-weight:bold;">Outstanding Number of Options</b></p></td><td style="vertical-align:bottom;white-space:nowrap;width:1.48%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:8pt;text-align:center;margin:0pt 0pt 0.05pt 0pt;"><b style="font-weight:bold;">    </b></p></td><td colspan="2" style="vertical-align:bottom;white-space:nowrap;width:19.96%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:8pt;text-align:center;margin:0pt 0pt 0.05pt 0pt;"><b style="font-weight:bold;">Exercisable Number of Options</b></p></td></tr><tr><td style="vertical-align:bottom;width:56.52%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;"><span style="font-size:8pt;visibility:hidden;">​</span></p></td><td style="vertical-align:bottom;white-space:nowrap;width:1.48%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:center;margin:0pt 0pt 0.05pt 0pt;"><span style="font-size:8pt;font-weight:bold;visibility:hidden;">​</span></p></td><td style="vertical-align:bottom;white-space:nowrap;width:20.54%;border-bottom:1px solid #000000;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:8pt;text-align:center;margin:0pt 0pt 0.05pt 0pt;"><b style="font-weight:bold;">(in thousands)</b></p></td><td style="vertical-align:bottom;white-space:nowrap;width:1.48%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:center;margin:0pt 0pt 0.05pt 0pt;"><span style="font-size:8pt;font-weight:bold;visibility:hidden;">​</span></p></td><td colspan="2" style="vertical-align:bottom;white-space:nowrap;width:19.96%;border-bottom:1px solid #000000;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:8pt;text-align:center;margin:0pt 0pt 0.05pt 0pt;"><b style="font-weight:bold;">(in thousands)</b></p></td></tr><tr><td style="vertical-align:bottom;width:56.52%;background:#cceeff;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;"><span style="text-decoration-color:#000000;text-decoration-line:underline;text-decoration-style:solid;">Plan Category</span></p></td><td style="vertical-align:bottom;white-space:nowrap;width:1.48%;background:#cceeff;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;"> </p></td><td style="vertical-align:bottom;white-space:nowrap;width:20.54%;background:#cceeff;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:right;margin:0pt 0pt 0.05pt 0pt;">  </p></td><td style="vertical-align:bottom;white-space:nowrap;width:1.48%;background:#cceeff;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;"> </p></td><td style="vertical-align:bottom;white-space:nowrap;width:1.4%;background:#cceeff;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:right;margin:0pt 0pt 0.05pt 0pt;"><span style="visibility:hidden;">​</span></p></td><td style="vertical-align:bottom;white-space:nowrap;width:18.55%;background:#cceeff;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:right;margin:0pt 0pt 0.05pt 0pt;">  </p></td></tr><tr><td style="vertical-align:bottom;width:56.52%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;">2005 Stock Option Plan</p></td><td style="vertical-align:bottom;white-space:nowrap;width:1.48%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;"> </p></td><td style="vertical-align:bottom;white-space:nowrap;width:20.54%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:right;margin:0pt 3pt 0.05pt 0pt;"> 325</p></td><td style="vertical-align:bottom;white-space:nowrap;width:1.48%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;"> </p></td><td style="vertical-align:bottom;white-space:nowrap;width:1.4%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:right;margin:0pt 0pt 0.05pt 0pt;"><span style="visibility:hidden;">​</span></p></td><td style="vertical-align:bottom;white-space:nowrap;width:18.55%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:right;margin:0pt 3pt 0.05pt 0pt;"> 325</p></td></tr><tr><td style="vertical-align:bottom;width:56.52%;background:#cceeff;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;">Equity Compensation Plans not approved by Shareholders</p></td><td style="vertical-align:bottom;white-space:nowrap;width:1.48%;background:#cceeff;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;"> </p></td><td style="vertical-align:bottom;white-space:nowrap;width:20.54%;background:#cceeff;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:right;margin:0pt 3pt 0.05pt 0pt;"> 28</p></td><td style="vertical-align:bottom;white-space:nowrap;width:1.48%;background:#cceeff;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;"> </p></td><td style="vertical-align:bottom;white-space:nowrap;width:1.4%;background:#cceeff;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:right;margin:0pt 0pt 0.05pt 0pt;"><span style="visibility:hidden;">​</span></p></td><td style="vertical-align:bottom;white-space:nowrap;width:18.55%;background:#cceeff;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:right;margin:0pt 3pt 0.05pt 0pt;"> 28</p></td></tr><tr><td style="vertical-align:bottom;width:56.52%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;">2017 Stock Option Plan</p></td><td style="vertical-align:bottom;white-space:nowrap;width:1.48%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;"> </p></td><td style="vertical-align:bottom;white-space:nowrap;width:20.54%;border-bottom:1px solid #000000;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:right;margin:0pt 3pt 0.05pt 0pt;"> 412</p></td><td style="vertical-align:bottom;white-space:nowrap;width:1.48%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;"> </p></td><td style="vertical-align:bottom;white-space:nowrap;width:1.4%;border-bottom:1px solid #000000;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:right;margin:0pt 0pt 0.05pt 0pt;"><span style="visibility:hidden;">​</span></p></td><td style="vertical-align:bottom;white-space:nowrap;width:18.55%;border-bottom:1px solid #000000;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:right;margin:0pt 3pt 0.05pt 0pt;"> 317</p></td></tr><tr><td style="vertical-align:bottom;width:56.52%;background:#cceeff;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;">Total</p></td><td style="vertical-align:bottom;white-space:nowrap;width:1.48%;background:#cceeff;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;"> </p></td><td style="vertical-align:bottom;white-space:nowrap;width:20.54%;background:#cceeff;border-bottom:3px double #000000;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:right;margin:0pt 3pt 0.05pt 0pt;"> 765</p></td><td style="vertical-align:bottom;white-space:nowrap;width:1.48%;background:#cceeff;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;"><span style="visibility:hidden;">​</span></p></td><td style="vertical-align:bottom;white-space:nowrap;width:1.4%;background:#cceeff;border-bottom:3px double #000000;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0.05pt 0pt;"><span style="visibility:hidden;">​</span></p></td><td style="vertical-align:bottom;white-space:nowrap;width:18.55%;background:#cceeff;border-bottom:3px double #000000;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:right;margin:0pt 3pt 0.05pt 0pt;"> 670</p></td></tr></table>
CY2021Q4 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
765000
CY2021Q4 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
670000
CY2021 us-gaap Proceeds From Stock Options Exercised
ProceedsFromStockOptionsExercised
200000
CY2020 us-gaap Proceeds From Stock Options Exercised
ProceedsFromStockOptionsExercised
600000
CY2020 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
14000
CY2021 us-gaap Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1
SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1
P6Y9M14D
CY2021 us-gaap Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
1630000
CY2020 us-gaap Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
2681000
CY2021 zyxi Excess Tax Benefit From Share Based Compensation
ExcessTaxBenefitFromShareBasedCompensation
200000
CY2020 zyxi Excess Tax Benefit From Share Based Compensation
ExcessTaxBenefitFromShareBasedCompensation
1700000
CY2021Q4 us-gaap Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options
ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions
765000
CY2021 us-gaap Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Remaining Contractual Term2
SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2
P4Y8M4D
CY2021Q4 us-gaap Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1
SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1
1.36
CY2021Q4 us-gaap Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options
ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
670000
CY2021 us-gaap Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1
P4Y3M29D
CY2021Q4 us-gaap Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1
SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
0.99
CY2021Q4 us-gaap Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options
EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
5500000
CY2021 us-gaap Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1
EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
P2Y8M12D
CY2021 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
1000000.0
CY2020 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
9600000
CY2020 us-gaap Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
1300000
CY2021 us-gaap Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
1300000
CY2021Q4 us-gaap Dividends Payable Amount Per Share
DividendsPayableAmountPerShare
0.10
CY2021Q4 zyxi Stock Dividend Common Stock Rate
StockDividendCommonStockRate
0.10
CY2022Q1 us-gaap Dividends Payable Current
DividendsPayableCurrent
3600000
CY2021Q4 zyxi Stock Dividend Common Stock Rate
StockDividendCommonStockRate
0.10
CY2022Q1 us-gaap Common Stock Dividends Shares
CommonStockDividendsShares
3600000
CY2021Q1 us-gaap Stock Repurchase Program Authorized Amount1
StockRepurchaseProgramAuthorizedAmount1
10000000.0
us-gaap Stock Repurchased During Period Shares
StockRepurchasedDuringPeriodShares
175179
us-gaap Stock Repurchased During Period Value
StockRepurchasedDuringPeriodValue
2700000
us-gaap Treasury Stock Acquired Average Cost Per Share
TreasuryStockAcquiredAverageCostPerShare
15.22
CY2021 us-gaap Income Loss From Continuing Operations Before Income Taxes Domestic
IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
22295000
CY2020 us-gaap Income Loss From Continuing Operations Before Income Taxes Domestic
IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
10185000
CY2021 us-gaap Income Loss From Continuing Operations Before Income Taxes Foreign
IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
-24000
CY2020 us-gaap Income Loss From Continuing Operations Before Income Taxes Foreign
IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
-32000
CY2021 us-gaap Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
22271000
CY2020 us-gaap Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
10153000
CY2021 us-gaap Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
5314000
CY2020 us-gaap Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
1133000
CY2021 us-gaap Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
-135000
CY2020 us-gaap Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
-122000
CY2021 us-gaap Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
4289000
CY2020 us-gaap Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
841000
CY2021 us-gaap Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
1025000
CY2020 us-gaap Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
292000
CY2021 us-gaap Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
-11000
CY2020 us-gaap Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
68000
CY2021 us-gaap Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
-146000
CY2020 us-gaap Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
-54000
CY2021 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
5168000
CY2020 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
1079000
CY2021 us-gaap Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
0.21
CY2020 us-gaap Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
0.21
CY2021 us-gaap Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
0.04
CY2020 us-gaap Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
0.03
CY2021 zyxi Effective Income Tax Rate Reconciliation Permanent Differences And Other Adjustments
EffectiveIncomeTaxRateReconciliationPermanentDifferencesAndOtherAdjustments
0
CY2020 zyxi Effective Income Tax Rate Reconciliation Permanent Differences And Other Adjustments
EffectiveIncomeTaxRateReconciliationPermanentDifferencesAndOtherAdjustments
0.01
CY2021 us-gaap Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost
-0.01
CY2020 us-gaap Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost
-0.15
CY2021 us-gaap Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
0.24
CY2020 us-gaap Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
0.10
CY2021Q4 us-gaap Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities
DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities
26000
CY2020Q4 us-gaap Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities
DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities
10000
CY2021Q4 zyxi Deferred Tax Assets Lease Liability
DeferredTaxAssetsLeaseLiability
4620000
CY2020Q4 zyxi Deferred Tax Assets Lease Liability
DeferredTaxAssetsLeaseLiability
1721000
CY2021Q4 zyxi Deferred Tax Assets Accounts Receivable
DeferredTaxAssetsAccountsReceivable
18000
CY2020Q4 zyxi Deferred Tax Assets Accounts Receivable
DeferredTaxAssetsAccountsReceivable
18000
CY2021Q4 us-gaap Deferred Tax Assets Inventory
DeferredTaxAssetsInventory
484000
CY2020Q4 us-gaap Deferred Tax Assets Inventory
DeferredTaxAssetsInventory
495000
CY2021Q4 us-gaap Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost
DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
271000
CY2020Q4 us-gaap Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost
DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
306000
CY2021Q4 zyxi Deferred Tax Assets Tax Credit And Operating Loss Carry Forwards Current
DeferredTaxAssetsTaxCreditAndOperatingLossCarryForwardsCurrent
8000
CY2020Q4 zyxi Deferred Tax Assets Tax Credit And Operating Loss Carry Forwards Current
DeferredTaxAssetsTaxCreditAndOperatingLossCarryForwardsCurrent
20000
CY2020Q4 us-gaap Deferred Tax Assets Other
DeferredTaxAssetsOther
1000
CY2021Q4 zyxi Deferred Tax Assets Good Will And Intangible Assets Non Current
DeferredTaxAssetsGoodWillAndIntangibleAssetsNonCurrent
90000
CY2020Q4 zyxi Deferred Tax Assets Good Will And Intangible Assets Non Current
DeferredTaxAssetsGoodWillAndIntangibleAssetsNonCurrent
43000
CY2021Q4 us-gaap Deferred Tax Assets Gross
DeferredTaxAssetsGross
5517000
CY2020Q4 us-gaap Deferred Tax Assets Gross
DeferredTaxAssetsGross
2614000
CY2021Q4 us-gaap Deferred Tax Assets Net
DeferredTaxAssetsNet
5517000
CY2020Q4 us-gaap Deferred Tax Assets Net
DeferredTaxAssetsNet
2614000
CY2021Q4 us-gaap Deferred Tax Liabilities Property Plant And Equipment
DeferredTaxLiabilitiesPropertyPlantAndEquipment
599000
CY2020Q4 us-gaap Deferred Tax Liabilities Property Plant And Equipment
DeferredTaxLiabilitiesPropertyPlantAndEquipment
470000
CY2021Q4 us-gaap Deferred Tax Liabilities Leasing Arrangements
DeferredTaxLiabilitiesLeasingArrangements
96000
CY2020Q4 us-gaap Deferred Tax Liabilities Leasing Arrangements
DeferredTaxLiabilitiesLeasingArrangements
78000
CY2021Q4 us-gaap Deferred Tax Liabilities Prepaid Expenses
DeferredTaxLiabilitiesPrepaidExpenses
77000
CY2020Q4 us-gaap Deferred Tax Liabilities Prepaid Expenses
DeferredTaxLiabilitiesPrepaidExpenses
20000
CY2021Q4 zyxi Deferred Tax Liabilities Right Of Use Asset
DeferredTaxLiabilitiesRightOfUseAsset
4034000
CY2020Q4 zyxi Deferred Tax Liabilities Right Of Use Asset
DeferredTaxLiabilitiesRightOfUseAsset
1480000
CY2021Q4 us-gaap Deferred Tax Liabilities
DeferredTaxLiabilities
4806000
CY2020Q4 us-gaap Deferred Tax Liabilities
DeferredTaxLiabilities
2048000
CY2021Q4 us-gaap Deferred Tax Assets Liabilities Net
DeferredTaxAssetsLiabilitiesNet
711000
CY2020Q4 us-gaap Deferred Tax Assets Liabilities Net
DeferredTaxAssetsLiabilitiesNet
566000
CY2021Q4 us-gaap Operating Loss Carryforwards
OperatingLossCarryforwards
200000
CY2021Q2 us-gaap Land Subject To Ground Leases
LandSubjectToGroundLeases
110754
CY2021Q2 us-gaap Lessee Operating Lease Renewal Term
LesseeOperatingLeaseRenewalTerm
P21M
CY2018 zyxi Rent Per Square Foot
RentPerSquareFoot
26.50
CY2021Q2 zyxi Rent Per Square Foot
RentPerSquareFoot
0.50
CY2021Q2 zyxi Additional Rent Per Square Foot
AdditionalRentPerSquareFoot
13.4
CY2021Q4 us-gaap Lessee Operating Lease Discount Rate
LesseeOperatingLeaseDiscountRate
0.0411
CY2021Q4 us-gaap Lessee Operating Lease Liability Payments Due Next Twelve Months
LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
3569000
CY2021Q4 us-gaap Finance Lease Liability Payments Due Next Twelve Months
FinanceLeaseLiabilityPaymentsDueNextTwelveMonths
154000
CY2021Q4 us-gaap Lessee Operating Lease Liability Payments Due Year Two
LesseeOperatingLeaseLiabilityPaymentsDueYearTwo
2982000
CY2021Q4 us-gaap Finance Lease Liability Payments Due Year Two
FinanceLeaseLiabilityPaymentsDueYearTwo
152000
CY2021Q4 us-gaap Lessee Operating Lease Liability Payments Due Year Three
LesseeOperatingLeaseLiabilityPaymentsDueYearThree
3496000
CY2021Q4 us-gaap Finance Lease Liability Payments Due Year Three
FinanceLeaseLiabilityPaymentsDueYearThree
116000
CY2021Q4 us-gaap Lessee Operating Lease Liability Payments Due Year Four
LesseeOperatingLeaseLiabilityPaymentsDueYearFour
3567000
CY2021Q4 us-gaap Finance Lease Liability Payments Due Year Four
FinanceLeaseLiabilityPaymentsDueYearFour
76000
CY2021Q4 us-gaap Lessee Operating Lease Liability Payments Due Year Five
LesseeOperatingLeaseLiabilityPaymentsDueYearFive
3362000
CY2021Q4 us-gaap Finance Lease Liability Payments Due Year Five
FinanceLeaseLiabilityPaymentsDueYearFive
15000
CY2021Q4 zyxi Lessee Operating Lease Liability To Be Paid Year Six
LesseeOperatingLeaseLiabilityToBePaidYearSix
4214000
CY2021Q4 us-gaap Lessee Operating Lease Liability Payments Due
LesseeOperatingLeaseLiabilityPaymentsDue
21190000
CY2021Q4 us-gaap Finance Lease Liability Payments Due
FinanceLeaseLiabilityPaymentsDue
513000
CY2021Q4 us-gaap Lessee Operating Lease Liability Undiscounted Excess Amount
LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
2475000
CY2021Q4 us-gaap Finance Lease Liability Undiscounted Excess Amount
FinanceLeaseLiabilityUndiscountedExcessAmount
78000
CY2021Q4 zyxi Operating Lease Liability Total
OperatingLeaseLiabilityTotal
18715000
CY2021Q4 us-gaap Finance Lease Liability
FinanceLeaseLiability
435000
CY2021 zyxi Operating And Finance Lease Cost
OperatingAndFinanceLeaseCost
3700000
CY2020 zyxi Operating And Finance Lease Cost
OperatingAndFinanceLeaseCost
1800000
CY2021 us-gaap Operating Lease Cost
OperatingLeaseCost
3549000
CY2020 us-gaap Operating Lease Cost
OperatingLeaseCost
1681000
CY2021 us-gaap Finance Lease Right Of Use Asset Amortization
FinanceLeaseRightOfUseAssetAmortization
105000
CY2020 us-gaap Finance Lease Right Of Use Asset Amortization
FinanceLeaseRightOfUseAssetAmortization
61000
CY2021 us-gaap Finance Lease Interest Expense
FinanceLeaseInterestExpense
41000
CY2020 us-gaap Finance Lease Interest Expense
FinanceLeaseInterestExpense
20000
CY2021 zyxi Finance Lease Cost
FinanceLeaseCost
146000
CY2020 zyxi Finance Lease Cost
FinanceLeaseCost
81000
CY2021Q4 zyxi Contingent Consideration Fair Value Disclosure
ContingentConsiderationFairValueDisclosure
9700000
CY2021Q4 zyxi Contingent Consideration Fair Value Disclosure
ContingentConsiderationFairValueDisclosure
9700000
CY2020Q4 zyxi Contingent Consideration Fair Value Disclosure
ContingentConsiderationFairValueDisclosure
0
CY2021 zyxi Defined Contribution Plan Eligibility Age
DefinedContributionPlanEligibilityAge
P18Y
CY2021 zyxi Defined Contribution Plan Period Of Employment For Eligibility
DefinedContributionPlanPeriodOfEmploymentForEligibility
P3M
CY2012 zyxi Defined Contribution Plan Description Of Employer Matching Contribution
DefinedContributionPlanDescriptionOfEmployerMatchingContribution
The Company has a discretionary employee match program and currently matches 35% of first 6% of an employee’s contributions.
CY2021 us-gaap Defined Contribution Plan Employer Matching Contribution Percent Of Match
DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
0.35
CY2021 us-gaap Defined Contribution Plan Employer Matching Contribution Percent
DefinedContributionPlanEmployerMatchingContributionPercent
0.06
CY2021 us-gaap Defined Contribution Plan Cost Recognized
DefinedContributionPlanCostRecognized
500000
CY2020 us-gaap Defined Contribution Plan Cost Recognized
DefinedContributionPlanCostRecognized
300000
CY2021Q1 us-gaap Revenues
Revenues
24127000
CY2021Q2 us-gaap Revenues
Revenues
31022000
CY2021Q3 us-gaap Revenues
Revenues
34785000
CY2021Q4 us-gaap Revenues
Revenues
40367000
CY2021Q1 us-gaap Costs And Expenses
CostsAndExpenses
25207000
CY2021Q2 us-gaap Costs And Expenses
CostsAndExpenses
27209000
CY2021Q3 us-gaap Costs And Expenses
CostsAndExpenses
26739000
CY2021Q4 us-gaap Costs And Expenses
CostsAndExpenses
28780000
CY2021Q1 us-gaap Operating Income Loss
OperatingIncomeLoss
-1080000
CY2021Q2 us-gaap Operating Income Loss
OperatingIncomeLoss
3813000
CY2021Q3 us-gaap Operating Income Loss
OperatingIncomeLoss
8046000
CY2021Q4 us-gaap Operating Income Loss
OperatingIncomeLoss
11587000
CY2021Q1 us-gaap Income Loss From Continuing Operations Before Interest Expense Interest Income Income Taxes Extraordinary Items Noncontrolling Interests Net
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-1087000
CY2021Q2 us-gaap Income Loss From Continuing Operations Before Interest Expense Interest Income Income Taxes Extraordinary Items Noncontrolling Interests Net
IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet
3768000
CY2021Q3 us-gaap Income Loss From Continuing Operations Before Interest Expense Interest Income Income Taxes Extraordinary Items Noncontrolling Interests Net
IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet
8028000
CY2021Q4 us-gaap Income Loss From Continuing Operations Before Interest Expense Interest Income Income Taxes Extraordinary Items Noncontrolling Interests Net
IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet
11562000
CY2021Q1 us-gaap Net Income Loss
NetIncomeLoss
-706000
CY2021Q2 us-gaap Net Income Loss
NetIncomeLoss
2808000
CY2021Q3 us-gaap Net Income Loss
NetIncomeLoss
6107000
CY2021Q4 us-gaap Net Income Loss
NetIncomeLoss
8894000
CY2021Q1 us-gaap Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
-0.02
CY2021Q2 us-gaap Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
0.07
CY2021Q3 us-gaap Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
0.16
CY2021Q4 us-gaap Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
0.23
CY2021Q1 us-gaap Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
-0.02
CY2021Q2 us-gaap Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
0.07
CY2021Q3 us-gaap Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
0.16
CY2021Q4 us-gaap Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
0.23
CY2020Q1 us-gaap Revenues
Revenues
15228000
CY2020Q2 us-gaap Revenues
Revenues
19263000
CY2020Q3 us-gaap Revenues
Revenues
20026000
CY2020Q4 us-gaap Revenues
Revenues
25605000
CY2020Q1 us-gaap Costs And Expenses
CostsAndExpenses
12770000
CY2020Q2 us-gaap Costs And Expenses
CostsAndExpenses
15178000
CY2020Q3 us-gaap Costs And Expenses
CostsAndExpenses
18617000
CY2020Q4 us-gaap Costs And Expenses
CostsAndExpenses
23308000
CY2020Q1 us-gaap Operating Income Loss
OperatingIncomeLoss
2458000
CY2020Q2 us-gaap Operating Income Loss
OperatingIncomeLoss
4085000
CY2020Q3 us-gaap Operating Income Loss
OperatingIncomeLoss
1409000
CY2020Q4 us-gaap Operating Income Loss
OperatingIncomeLoss
2297000
CY2020Q1 us-gaap Income Loss From Continuing Operations Before Interest Expense Interest Income Income Taxes Extraordinary Items Noncontrolling Interests Net
IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet
2454000
CY2020Q2 us-gaap Income Loss From Continuing Operations Before Interest Expense Interest Income Income Taxes Extraordinary Items Noncontrolling Interests Net
IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet
4080000
CY2020Q3 us-gaap Income Loss From Continuing Operations Before Interest Expense Interest Income Income Taxes Extraordinary Items Noncontrolling Interests Net
IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet
1404000
CY2020Q4 us-gaap Income Loss From Continuing Operations Before Interest Expense Interest Income Income Taxes Extraordinary Items Noncontrolling Interests Net
IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet
2215000
CY2020Q1 us-gaap Net Income Loss
NetIncomeLoss
2937000
CY2020Q2 us-gaap Net Income Loss
NetIncomeLoss
3017000
CY2020Q3 us-gaap Net Income Loss
NetIncomeLoss
1333000
CY2020Q4 us-gaap Net Income Loss
NetIncomeLoss
1787000
CY2020Q1 us-gaap Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
0.08
CY2020Q2 us-gaap Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
0.08
CY2020Q3 us-gaap Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
0.04
CY2020Q4 us-gaap Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
0.05
CY2020Q1 us-gaap Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
0.08
CY2020Q2 us-gaap Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
0.08
CY2020Q3 us-gaap Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
0.03
CY2020Q4 us-gaap Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
0.05

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