XML 31 R20.htm IDEA: XBRL DOCUMENT v3.21.2

STOCK-BASED COMPENSATION PLANS (Tables)

6 Months Ended

Jun. 30, 2021

STOCK-BASED COMPENSATION PLANS

Schedule of outstanding and exercisable number of options

​

​	​	​	​	​	​
​		Outstanding		Exercisable
​	​	Number of Options	​	Number of Options
​	​	(in thousands)	​	(in thousands)
Plan Category				​
2005 Stock Option Plan		295		​	295
Equity Compensation Plans not approved by  Shareholders		37		​	37
2017 Stock Option Plan		412		​	265
Total		744	​	​	597

Schedule of share based compensation expenses recorded in the consolidated statement of income

The following summarizes stock-based compensation expenses recorded in the consolidated statements of operations (in thousands):

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

For the Three Months Ended June 30,

For the Six Months Ended June 30,

​

​

2021

2020

2021

2020

​

Cost of Revenue

​

$

15

​

$

2

​

$

30

​

$

9

​

Sales and marketing expense

​

15

​

98

​

30

​

127

​

General, and administrative

​

​

371

​

​

479

​

​

449

​

​

940

​

Total stock based compensation expense

​

​

401

​

​

579

​

​

509

​

​

1,076

​

Summary of fair value of stock options grants

The Company did not grant any stock options during the three and six months ended June 30, 2021, nor during the three months ended June 30, 2020. The Company used the Black Scholes option pricing model to determine the fair value of stock option grants, using the following assumptions for the six months ended June 30, 2020:

​

​	​	​	​
Expected term (years)	​	6.79	​
Risk-free interest rate	​	1.59	%
Expected volatility	​	116.76	%
Expected dividend yield	​	—	%

Summary of stock option activity under the option plan

A summary of stock option activity under all equity compensation plans for the six months ended June 30, 2021, is presented below:

​

​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	Weighted-	​	​	​
​	​	​	​	Weighted-		​	Average	​	Aggregate
​	​	Number of	​	Average		​	Remaining	​	Intrinsic
​	​	Shares	​	Exercise		​	Contractual	​	Value
​		(in thousands)		Price			Term (Years)		(in thousands)
Outstanding at December 31, 2020		1,006	​	$	3.04	​	6.47	​	$	10,483
Forfeited		(190)	​	$	7.34	​	​	​		​
Exercised	​	(72)	​	$	6.90	​	​	​	​	​
Outstanding at June 30, 2021		744	​	$	1.57	​	5.29	​	$	10,386
​	​	​	​	​	​	​	​	​	​	​
Exercisable at June 30, 2021		597	​	$	1.01	​	4.78	​	$	8,674

Schedule of restricted stock award activity under all equity compensation plans

A summary of restricted stock award activity under all equity compensation plans for the six months ended June 30, 2021, is presented below:

​

​	​	​
​	​	Number of
​	​	Shares
​		(in thousands)
Granted but not vested at December 31, 2020		268
Granted		95
Forfeited		(68)
Vested		(71)
Granted but not vested at June 30, 2021		224

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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_NonvestedRestrictedStockSharesActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum: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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum: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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)
-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 (e)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

Reference 3: 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)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ 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 (f)(2)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum: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:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration