$ZYXI
ZYNEX INC

2019 Q4 Form 10-K Financial Statement

#000110465921028312 Filed on February 25, 2021

View on sec.gov

Income Statement

Concept 2019 Q4 2019 Q3 2019 Q2
Revenue $14.16M $11.82M $10.30M
YoY Change 51.68% 45.33% 35.97%
Cost Of Revenue $2.820M $2.261M $1.948M
YoY Change 54.1% 37.78% 46.47%
Gross Profit $11.34M $9.556M $8.349M
YoY Change 51.0% 47.24% 33.73%
Gross Profit Margin 80.07% 80.87% 81.08%
Selling, General & Admin $8.240M $7.061M $5.765M
YoY Change 77.97% 92.4% 63.41%
% of Gross Profit 72.66% 73.89% 69.05%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization
YoY Change
% of Gross Profit
Operating Expenses $7.610M $7.061M $5.765M
YoY Change 64.36% 92.4% 63.41%
Operating Profit $3.731M $2.495M $2.584M
YoY Change 29.55% -11.52% -4.83%
Interest Expense -$10.00K $0.00 $0.00
YoY Change -100.0% -100.0%
% of Operating Profit -0.27% 0.0% 0.0%
Other Income/Expense, Net $0.00 $1.000K $0.00
YoY Change -200.0% -100.0%
Pretax Income $3.730M $2.496M $2.584M
YoY Change 29.51% -11.46% -3.51%
Income Tax $780.0K $463.0K $422.0K
% Of Pretax Income 20.91% 18.55% 16.33%
Net Earnings $2.947M $2.033M $2.162M
YoY Change 12.4% -21.54% -10.59%
Net Earnings / Revenue 20.81% 17.2% 21.0%
Basic Earnings Per Share $0.06 $0.07
Diluted Earnings Per Share $86.51K $0.06 $0.06
COMMON SHARES
Basic Shares Outstanding 32.49M 32.33M
Diluted Shares Outstanding 34.08M 33.95M

Balance Sheet

Concept 2019 Q4 2019 Q3 2019 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments $14.04M $11.93M $10.05M
YoY Change 38.6% 47.28% 59.78%
Cash & Equivalents $14.04M
Short-Term Investments
Other Short-Term Assets $320.0K $320.0K $830.0K
YoY Change -43.86% -11.11% 43.1%
Inventory $2.378M $2.130M $1.330M
Prepaid Expenses
Receivables $5.833M $4.250M $3.540M
Other Receivables $0.00 $0.00 $0.00
Total Short-Term Assets $22.57M $18.64M $15.75M
YoY Change 57.54% 53.37% 53.73%
LONG-TERM ASSETS
Property, Plant & Equipment $858.0K $5.050M $5.150M
YoY Change 4.76% 509.17% 561.95%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets $840.0K $1.030M $930.0K
YoY Change -19.23% 232.26% 151.35%
Total Long-Term Assets $5.711M $6.080M $6.090M
YoY Change 15.91% 431.93% 430.49%
TOTAL ASSETS
Total Short-Term Assets $22.57M $18.64M $15.75M
Total Long-Term Assets $5.711M $6.080M $6.090M
Total Assets $28.28M $24.72M $21.84M
YoY Change 46.89% 85.91% 91.7%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable $2.130M $1.950M $1.830M
YoY Change 37.42% 5.98% 12.27%
Accrued Expenses $2.960M $2.390M $1.970M
YoY Change 87.34% 210.39% 185.51%
Deferred Revenue
YoY Change
Short-Term Debt $0.00 $0.00 $0.00
YoY Change
Long-Term Debt Due $50.00K $50.00K $10.00K
YoY Change 400.0% 66.67% -83.33%
Total Short-Term Liabilities $5.197M $4.520M $3.830M
YoY Change -25.58% 28.34% 17.23%
LONG-TERM LIABILITIES
Long-Term Debt $150.0K $150.0K $0.00
YoY Change 1400.0%
Other Long-Term Liabilities $3.280M $3.660M $3.940M
YoY Change 10.44% 542.11% 756.52%
Total Long-Term Liabilities $3.430M $3.810M $3.940M
YoY Change 15.1% 568.42% 756.52%
TOTAL LIABILITIES
Total Short-Term Liabilities $5.197M $4.520M $3.830M
Total Long-Term Liabilities $3.430M $3.810M $3.940M
Total Liabilities $8.624M $8.240M $7.680M
YoY Change -13.41% 98.84% 99.43%
SHAREHOLDERS EQUITY
Retained Earnings $14.36M
YoY Change 195.15%
Common Stock $9.232M
YoY Change 12.71%
Preferred Stock
YoY Change
Treasury Stock (at cost) $3.846M
YoY Change 4.65%
Treasury Stock Shares $1.071M
Shareholders Equity $19.74M $16.48M $14.16M
YoY Change
Total Liabilities & Shareholders Equity $28.28M $24.72M $21.84M
YoY Change 46.89% 85.91% 91.7%

Cashflow Statement

Concept 2019 Q4 2019 Q3 2019 Q2
OPERATING ACTIVITIES
Net Income $2.947M $2.033M $2.162M
YoY Change 12.4% -21.54% -10.59%
Depreciation, Depletion And Amortization
YoY Change
Cash From Operating Activities $2.090M $1.850M $600.0K
YoY Change -20.83% -40.89% -77.36%
INVESTING ACTIVITIES
Capital Expenditures -$30.00K $10.00K -$90.00K
YoY Change -84.21% -104.35% -82.0%
Acquisitions
YoY Change
Other Investing Activities
YoY Change
Cash From Investing Activities -$30.00K $10.00K -$90.00K
YoY Change -84.21% -104.35% -82.0%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities 40.00K 30.00K 130.0K
YoY Change -109.76% -102.75% -156.52%
NET CHANGE
Cash From Operating Activities 2.090M 1.850M 600.0K
Cash From Investing Activities -30.00K 10.00K -90.00K
Cash From Financing Activities 40.00K 30.00K 130.0K
Net Change In Cash 2.100M 1.890M 640.0K
YoY Change 2.94% 4.42% -66.67%
FREE CASH FLOW
Cash From Operating Activities $2.090M $1.850M $600.0K
Capital Expenditures -$30.00K $10.00K -$90.00K
Free Cash Flow $2.120M $1.840M $690.0K
YoY Change -25.09% -45.24% -78.1%

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InventoryTransferredToPropertyAndEquipmentUnderLease
811000
CY2019 zyxi Inventory Transferred To Property And Equipment Under Lease
InventoryTransferredToPropertyAndEquipmentUnderLease
652000
CY2018Q4 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
9291000
CY2019 zyxi Stock Issued During Period Value Stock Based Awards Exercised And Vested
StockIssuedDuringPeriodValueStockBasedAwardsExercisedAndVested
221000
CY2019 us-gaap Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition
AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition
820000
CY2019 us-gaap Stock Repurchased During Period Value
StockRepurchasedDuringPeriodValue
171000
CY2019 us-gaap Profit Loss
ProfitLoss
9492000
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 Decrease From Deconsolidation
NoncontrollingInterestDecreaseFromDeconsolidation
89000
CY2020 us-gaap Profit Loss
ProfitLoss
9074000
CY2020Q4 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
56855000
CY2020 us-gaap Prior Period Reclassification Adjustment Description
PriorPeriodReclassificationAdjustmentDescription
<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:underline;">Reclassifications</b></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 12pt 0pt;">During 2020, the Company re-allocated certain costs related to selling and marketing activities from general and administrative costs. As a result, reclassifications between selling and marketing costs and general and administrative costs have been made to the results of operations for the year ended December 31, 2019 to conform to the consolidated 2020 financial statement presentation. These reclassifications resulted in an increase of $0.8 million to sales and marketing expenses and a decrease in general and administrative expenses for the same amount for the year ended <span style="-sec-ix-hidden:Hidden_mw3esTG0gEqQBZyQdh8ugw;"><span style="color:#000000;font-family:'Times New Roman','Times','serif';font-size:10pt;font-style:normal;font-weight:normal;text-align:left;white-space:pre-wrap;">December 31, 2019</span></span><span style="white-space:pre-wrap;">. As a result, the reclassifications had no effect on net earnings, retained earnings or cash flows as previously reported.</span></p>
CY2020 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:underline;">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 U.S. 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 and sales demo unit devices, stock-based compensation, and valuation of long-lived assets and realizability of deferred tax assets.</p>
CY2020Q4 us-gaap Inventory Lifo Reserve
InventoryLIFOReserve
152000
CY2019Q4 us-gaap Inventory Lifo Reserve
InventoryLIFOReserve
415000
CY2020Q4 us-gaap Inventory Net
InventoryNet
8635000
CY2019Q4 us-gaap Inventory Net
InventoryNet
2378000
CY2019Q4 us-gaap Inventory Gross
InventoryGross
2793000
CY2020 us-gaap Lessee Operating Lease Existence Of Option To Terminate
LesseeOperatingLeaseExistenceOfOptionToTerminate
true
CY2020Q4 us-gaap Inventory Raw Materials And Supplies
InventoryRawMaterialsAndSupplies
3213000
CY2019Q4 us-gaap Inventory Raw Materials And Supplies
InventoryRawMaterialsAndSupplies
953000
CY2020Q4 us-gaap Inventory Work In Process
InventoryWorkInProcess
1455000
CY2019Q4 us-gaap Inventory Work In Process
InventoryWorkInProcess
200000
CY2020Q4 us-gaap Inventory Finished Goods
InventoryFinishedGoods
4119000
CY2019Q4 us-gaap Inventory Finished Goods
InventoryFinishedGoods
1640000
CY2020Q4 us-gaap Inventory Gross
InventoryGross
8787000
CY2020 us-gaap Lessee Operating Lease Existence Of Option To Extend
LesseeOperatingLeaseExistenceOfOptionToExtend
true
CY2020 us-gaap Research And Development Expense
ResearchAndDevelopmentExpense
800000
CY2019 us-gaap Research And Development Expense
ResearchAndDevelopmentExpense
600000
CY2019 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
4400000
CY2019 us-gaap Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
0.21
CY2020Q4 us-gaap Property Plant And Equipment Gross
PropertyPlantAndEquipmentGross
4432000
CY2019Q4 us-gaap Property Plant And Equipment Gross
PropertyPlantAndEquipmentGross
2921000
CY2020Q4 us-gaap Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
2507000
CY2019Q4 us-gaap Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
2063000
CY2020Q4 us-gaap Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
1925000
CY2019Q4 us-gaap Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
858000
CY2020 us-gaap Net Income Loss
NetIncomeLoss
9074000
CY2019 us-gaap Net Income Loss
NetIncomeLoss
9492000
CY2020 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
33869000
CY2019 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
32439000
CY2020 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
0.27
CY2019 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
0.29
CY2020 us-gaap Net Income Loss
NetIncomeLoss
9074000
CY2019 us-gaap Net Income Loss
NetIncomeLoss
9492000
CY2020 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
33869000
CY2019 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
32439000
CY2020 us-gaap Weighted Average Number Diluted Shares Outstanding Adjustment
WeightedAverageNumberDilutedSharesOutstandingAdjustment
1074000
CY2019 us-gaap Weighted Average Number Diluted Shares Outstanding Adjustment
WeightedAverageNumberDilutedSharesOutstandingAdjustment
1524000
CY2020 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
34943000
CY2019 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
33963000
CY2020 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
0.26
CY2019 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
0.28
CY2020Q4 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
1000000.0
CY2019 us-gaap Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments
IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
11941000
CY2020Q4 us-gaap Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options
EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
4300000
CY2020 us-gaap Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1
EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
P2Y3M18D
CY2020 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
9600000
CY2020 zyxi Schedule Of Outstanding And Exercisable Number Of Options
ScheduleOfOutstandingAndExercisableNumberOfOptions
<p style="font-family:'Times New Roman','Times','serif';font-size:10pt;min-height:0.0pt;margin:0pt;"><span style="font-size:0pt;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%;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:underline;text-decoration-color:#000000;">Plan Category</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;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 0pt 0.05pt 0pt;">  </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 0pt 0.05pt 0pt;">  </p></td></tr><tr><td style="background-color:#cceeff;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="background-color:#cceeff;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="background-color:#cceeff;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;"> 299</p></td><td style="background-color:#cceeff;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="background-color:#cceeff;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="background-color:#cceeff;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;"> 299</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;">Equity Compensation Plans not approved by  Shareholders</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;"> 37</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;"> 25</p></td></tr><tr><td style="background-color:#cceeff;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="background-color:#cceeff;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="background-color:#cceeff;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;"> 670</p></td><td style="background-color:#cceeff;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="background-color:#cceeff;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="background-color:#cceeff;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;"> 251</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;">Total</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;"> 1,006</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;"><span style="visibility:hidden;">​</span></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;margin:0pt 0pt 0.05pt 0pt;">$</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;"> 575</p></td></tr></table>
CY2020Q4 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
1006000
CY2020Q4 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
575000
CY2020 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
0
CY2019 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
0
CY2020Q4 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
600000
CY2020 us-gaap Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1
SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1
P6Y9M14D
CY2019 us-gaap Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1
SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1
P6Y3M
CY2020 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
1.17
CY2019 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
1.22
CY2020 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
0.0159
CY2019 us-gaap Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
0.0230
CY2020 us-gaap Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
2681000
CY2019 us-gaap Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
820000
CY2020 us-gaap Proceeds From Stock Options Exercised
ProceedsFromStockOptionsExercised
1700000
CY2019 us-gaap Proceeds From Stock Options Exercised
ProceedsFromStockOptionsExercised
800000
CY2020Q4 us-gaap Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options
ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions
1006000
CY2020 us-gaap Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Remaining Contractual Term2
SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2
P6Y5M19D
CY2020Q4 us-gaap Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1
SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1
3.04
CY2020Q4 us-gaap Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options
ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
575000
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R9.htm Edgar Link pending
report.css Edgar Link pending
Show.js Edgar Link pending
zyxi-20201231.xsd Edgar Link pending
zyxi-20201231x10k.htm Edgar Link pending
zyxi-20201231x10k_htm.xml Edgar Link completed
zyxi-20201231xex21.htm Edgar Link pending
zyxi-20201231xex23d1.htm Edgar Link pending
zyxi-20201231xex31d1.htm Edgar Link pending
zyxi-20201231xex31d2.htm Edgar Link pending
zyxi-20201231xex32d1.htm Edgar Link pending
zyxi-20201231xex32d2.htm Edgar Link pending
zyxi-20201231xex4.htm Edgar Link pending
zyxi-20201231_cal.xml Edgar Link unprocessable
zyxi-20201231_def.xml Edgar Link unprocessable
zyxi-20201231_lab.xml Edgar Link unprocessable
zyxi-20201231_pre.xml Edgar Link unprocessable