XML 44 R33.htm IDEA: XBRL DOCUMENT
v3.24.3

STOCK-BASED COMPENSATION PLANS (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2024
STOCK-BASED COMPENSATION PLANS |
Schedule of outstanding and exercisable number of options | ​
​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​
​ | ​ | ​ | ​ | ​
​ | ​ | Outstanding Number of Options | ​ | Exercisable Number of Options
​ | ​ | (in thousands) | ​ | (in thousands)
Plan Category |  |  |  |
2005 Stock Option Plan |  | 1 | ​ | 1
2017 Stock Option Plan |  | 338 | ​ | 338
Total |  | 339 | ​ | 339
Schedule of stock-based compensation expenses recorded in the condensed consolidated statements of operations | The following summarizes stock-based compensation expenses recorded in the condensed consolidated statements of income (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the Three Months Ended September 30, |  | For the Nine Months Ended September 30,
​ |  | 2024 |  | 2023 |  | 2024 |  | 2023
Cost of Revenue | ​ | $ | 10 | ​ | $ | 10 | ​ | $ | 27 | ​ | $ | 26
Sales and marketing expense | ​ |  | 125 | ​ |  | 53 | ​ |  | 492 | ​ |  | 182
General, and administrative | ​ | ​ | 635 | ​ | ​ | 591 | ​ | ​ | 1,826 | ​ | ​ | 1,413
Total stock-based compensation expense | ​ | $ | 770 | ​ | $ | 654 | ​ | $ | 2,345 | ​ | $ | 1,621
Schedule of stock option activity under all equity compensation plans | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted- | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted- | ​ | Average | ​ | Aggregate
​ | ​ | Number of | ​ | Average | ​ | Remaining | ​ | Intrinsic
​ | ​ | Shares | ​ | Exercise | ​ | Contractual | ​ | Value
​ |  | (in thousands) |  | Price |  | Term (Years) |  | (in thousands)
Outstanding at December 31, 2023 |  | 349 | ​ | $ | 1.82 | ​ | 4.12 | ​ | $ | 3,163
Granted |  | — | ​ | ​ | — | ​ | — | ​ | ​ | —
Forfeited | ​ | (3) | ​ | ​ | 3.14 | ​ | — | ​ | ​ | —
Exercised |  | (7) | ​ | ​ | 2.46 | ​ | — | ​ | ​ | —
Outstanding and exercisable at September 30, 2024 |  | 339 | ​ | $ | 1.79 | ​ | 3.38 | ​ | $ | 2,156
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of restricted stock award activity under all equity compensation plans | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Number of | ​ | ​
​ | ​ | Shares |  | Weighted Average
​ |  | (in thousands) |  | Grant Date Fair Value
Outstanding at December 31, 2023 | ​ | 502 | ​ | $ | 10.73
Granted | ​ | 229 | ​ | ​ | 10.66
Forfeited | ​ | (14) | ​ | ​ | 10.03
Vested | ​ | (209) | ​ | ​ | 11.37
Outstanding at September 30, 2024 |  | 508 | ​ | $ | 10.46
​ | ​ | ​ | ​ | ​ | ​

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Subparagraph (c) -Paragraph 2 -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_NonvestedRestrictedStockSharesActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure for outstanding and exercisable number of stock options. + References No definition available. + Details
Name: | zyxi_ScheduleOfOutstandingAndExercisableNumberOfStockOptionsTableTextBlock
Namespace Prefix: | zyxi_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration