XML 44 R33.htm IDEA: XBRL DOCUMENT
v3.20.2

STOCK-BASED COMPENSATION PLANS - Outstanding and exercisable number of stock options (Details) shares in Thousands | Sep. 30, 2020 shares
--- | ---
Share-based Compensation Arrangement by Share-based Payment Award |
Outstanding Number of Options (in shares) | 1,015
Number of Shares, Exercisable | 543
2005 Stock Option Plan |
Share-based Compensation Arrangement by Share-based Payment Award |
Outstanding Number of Options (in shares) | 299
Number of Shares, Exercisable | 299
Equity Compensation Plans not approved by Shareholders |
Share-based Compensation Arrangement by Share-based Payment Award |
Outstanding Number of Options (in shares) | 37
Number of Shares, Exercisable | 25
2017 Stock Option Plan |
Share-based Compensation Arrangement by Share-based Payment Award |
Outstanding Number of Options (in shares) | 679
Number of Shares, Exercisable | 219

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_PlanNameAxis=zyxi_TwoThousandAndFiveStockOptionPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=zyxi_EquityCompensationPlansNotApprovedByShareholdersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=zyxi_StockIncentivePlan2017Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |