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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2020
Share-based Payment Arrangement [Abstract] |
Weighted Average Assumptions Used in Estimating Fair Value of Stock Options |
|  | As of December 31, |
|  | 2020 |  |  | 2019 |
Valuation assumptions: |  |  |  |  |  |  |  |
Expected dividend yield |  |  | 0 | % |  |  | 0 | %
Expected volatility |  |  | 44.1 | % |  |  | 40.8 | %
Expected term (years) |  |  | 5.8 |  |  |  | 6.0 |
Risk-free interest rate |  |  | 1.5 | % |  |  | 2.1 | %
Schedule Of Stock Based Compensation Expenses | The stock-based compensation is reflected in the statements of operations as follows (in thousands):
|  | For the year ended December 31, |
|  | 2020 |  |  | 2019 |
Cost of goods sold |  | $ | 2 |  |  | $ | — |
Research and development |  |  | 548 |  |  |  | 474 |
Sales and marketing |  |  | 390 |  |  |  | 174 |
General and administrative |  |  | 1,624 |  |  |  | 1,556 |
Total |  |  | 2,564 |  |  |  | 2,204 |
Summary of Outstanding Stock Option Activity | A summary of the Company’s stock option activity is as follows (shares in thousands):
|  | Number of shares |  |  | Weighted average exercise price |  |  | Weighted average remaining contractual term (years) |
Balance at December 31, 2019 |  |  | 1,600 |  |  | $ | 9.98 |  |  |  |  |
Granted |  |  | 402 |  |  |  | 10.05 |  |  |  |  |
Exercised |  |  | (120 | ) |  |  | 8.49 |  |  |  |  |
Expired/Forfeited |  |  | (122 | ) |  |  | 10.38 |  |  |  |  |
Balance at December 31, 2020 |  |  | 1,760 |  |  |  | 10.07 |  |  |  | 7.6 |
Vested and exercisable at December 31, 2020 |  |  | 984 |  |  | $ | 9.40 |  |  |  | 6.7 |
Vested and expected to vest at December 31, 2020 |  |  | 1,760 |  |  | $ | 10.07 |  |  |  | 7.6 |
Summary of Outstanding Restricted Stock Unit Activity | The following table summarizes the Company’s restricted stock unit activity (shares in thousands):
|  | Restricted stock units |  |  | Weighted average grant date fair value |
Balance at December 31, 2019 |  |  | 80 |  |  | $ | 11.43 |
Grants |  |  | 151 |  |  |  | 10.17 |
Vested |  |  | (29 | ) |  |  | 11.28 |
Balance at December 31, 2020 |  |  | 202 |  |  |  | 10.51 |

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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 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 S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + Details
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- 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
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- 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
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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 http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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