XML 44 R32.htm IDEA: XBRL DOCUMENT
v3.21.2

Stock-Based Compensation (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2021
Stock-Based Compensation |
Summary of compensation costs related to stock-based awards | The following table summarizes compensation costs related to our stock-based awards (in thousands, except per share data): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Nine Months Ended | ​
​ | ​ | September 30, | ​ | September 30, | ​
​ |  | 2021 |  | 2020 |  | 2021 |  | 2020 |
Cost of revenue | ​ | $ | 188 | ​ | $ | 28 | ​ | $ | 263 | ​ | $ | 83 | ​
Selling, general and administrative | ​ |  | 1,252 | ​ |  | 496 | ​ |  | 2,694 | ​ |  | 1,480 | ​
Research and development | ​ |  | 199 | ​ |  | 124 | ​ |  | 473 | ​ |  | 369 | ​
Total stock-based compensation | ​ |  | 1,639 | ​ |  | 648 | ​ |  | 3,430 | ​ |  | 1,932 | ​
Tax effect on stock-based compensation | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​
Net effect on net income | ​ | $ | 1,639 | ​ | $ | 648 | ​ | $ | 3,430 | ​ | $ | 1,932 | ​
Summary of stock option activity | The following table summarizes the stock option transactions during the nine months ended September 30, 2021 (in thousands, except per share data):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted- | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ |  | average |  | ​ | ​ |
​ | ​ | ​ | ​ | Weighted- | ​ | Remaining | ​ | ​ | ​ |
​ | ​ | Number of | ​ | average | ​ | Contractual | ​ | Aggregate |
​ | ​ | Options | ​ | Exercise | ​ | Life | ​ | Intrinsic |
Stock Options |  | Outstanding |  | Price |  | (in years) |  | Value |
Balance as of January 1, 2021 |  | 1,885 | ​ | $ | 4.42 |  | 6.17 | ​ | $ | 9,713 | ​
Granted |  | — | ​ |  | — | ​ | ​ | ​ | ​ | ​ | ​
Exercised |  | (482) | ​ | ​ | 3.30 | ​ | ​ | ​ | ​ | ​ | ​
Canceled and expired |  | — | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | ​
Balance as of September 30, 2021 |  | 1,403 | ​ | $ | 4.80 |  | 5.78 | ​ | $ | 5,094 | ​
Options vested as of September 30, 2021 and unvested options expected to vest, net of forfeitures |  | 1,397 | ​ | $ | 4.81 |  | 5.77 | ​ | $ | 5,064 | ​
Options exercisable as of September 30, 2021 |  | 1,081 | ​ | $ | 5.13 |  | 5.16 | ​ | $ | 3,605 | ​
Summary of restricted stock awards activity | A summary of activity related to restricted stock awards for the nine months ended September 30, 2021 is presented below (in thousands, except per share data):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted-Average |
​ | ​ | ​ | ​ | Grant Date |
Stock Awards |  | Shares |  | Share Value |
Non-vested as of January 1, 2021 | ​ | 1,022 | ​ | $ | 5.27 | ​
Granted |  | 67 | ​ | $ | 11.58 | ​
Vested |  | (139) | ​ | $ | 5.85 | ​
Forfeited | ​ | (12) | ​ | $ | 5.29 | ​
Non-vested as of September 30, 2021 |  | 938 | ​ | $ | 5.64 | ​
Summary of unvested at-risk performance shares | A summary of the status of our unvested at-risk, performance shares as of September 30, 2021 is presented below (in thousands, except per share data): ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted-Average
​ | ​ | ​ | ​ | Grant Date
Stock Awards |  | Shares* |  | Share Value
Non-vested as of January 1, 2021 | ​ | — | ​ | $ | —
Granted |  | 152 | ​ | $ | 15.37
Vested |  | — | ​ | $ | —
Forfeited | ​ | — | ​ | $ | —
Non-vested as of September 30, 2021 |  | 152 | ​ | $ | 15.37

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 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 of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock
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 number and weighted-average grant date fair value for nonvested performance 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_ShareBasedCompensationPerformanceSharesAwardUnvestedActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration