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Stock-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2022
Stock-Based Compensation |
Estimation Using Black-Scholes Option Pricing Model With Following Weighted Average Assumptions | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended | ​ |  | Nine Months Ended | ​
​ |  | September 30, 2022 |  | ​ | September 30, 2022 |
Risk-free interest rate | ​ |  | 3.56 | % | ​ |  | 2.86 | %
Expected volatility | ​ |  | 75.75 | % | ​ |  | 74.94 | %
Expected term (years) | ​ |  | 5.74 | ​ | ​ |  | 5.65 | ​
Expected dividend yield | ​ | ​ | 0.00 | % | ​ | ​ | 0.00 | %
Fair value per option | ​ | $ | 0.36 | ​ | ​ | $ | 1.09 | ​
Summary of Stock-Based Compensation Expense is Classified in Condensed Consolidated Statements of Operations and Comprehensive Loss | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended | ​ | Nine Months Ended
​ | ​ | September 30, | ​ | September 30,
​ | ​ | 2022 | ​ | 2021 | ​ | 2022 | ​ | 2021
Cost of sales | ​ | $ | 4 | ​ | $ | 2 | ​ | $ | 11 | ​ | $ | 5
Selling, general and administrative | ​ |  | 1,367 | ​ |  | 582 | ​ |  | 1,837 | ​ |  | 3,351
Research and development | ​ | ​ | 70 | ​ | ​ | 156 | ​ | ​ | 174 | ​ | ​ | 540
Total stock-based compensation expense | ​ | $ | 1,441 | ​ | $ | 740 | ​ | $ | 2,022 | ​ | $ | 3,896

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + 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 https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- 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 https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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