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Stock-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Stock-based Compensation Expense | Total estimated stock-based compensation expense for employees and non-employees, related to all of the Company’s stock-based awards, was as follows:
|  | Three Months Ended |
|  | March 31, |
|  | 2022 |  |  | 2021 |
|  | (in thousands) |
Cost of revenue |  | $ | 26 |  |  | $ | 397 |
Selling and marketing |  |  | 398 |  |  |  | 331 |
Research and development |  |  | 283 |  |  |  | 249 |
General and administrative |  |  | 830 |  |  |  | 809 |
Total stock-based compensation |  | $ | 1,537 |  |  | $ | 1,786 |
Stock Activity and Total Number of Shares Available for Grant | The following table presents the stock activity and the total number of shares available for grant as of March 31, 2022:
|  | (in thousands) |
Balance at December 31, 2021 |  |  | 998 |
Options cancelled |  |  | 5 |
Restricted stock granted |  |  | (43 | )
Forfeited/Expired restricted stock added back |  |  | 5 |
Balance at March 31, 2022 |  |  | 965 |
Stock Option Activity |
|  | Options Outstanding |
|  | Number of Shares Underlying Outstanding Options |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Remaining Contractual Term |  |  | Aggregate Intrinsic Value |
|  |  |  |  |  |  |  |  |  | (in years) |  |  |  |  |
Outstanding at December 31, 2021 |  |  | 1,739,240 |  |  | $ | 7.72 |  |  | $ | 7.02 |  |  | $ | 25,542,823 |
Options Granted |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Options Exercised |  |  | (47,078 | ) |  |  | 7.67 |  |  |  |  |  |  |  |  |
Options Forfeited |  |  | (5,198 | ) |  |  | 16.27 |  |  |  |  |  |  |  |  |
Outstanding at March 31, 2022 |  |  | 1,686,964 |  |  | $ | 7.70 |  |  |  | 6.64 |  |  | $ | 23,231,263 |
Vested and expected to vest at March 31, 2022 |  |  | 1,666,854 |  |  | $ | 7.75 |  |  |  | 6.62 |  |  | $ | 22,967,200 |
Exercisable at March 31, 2022 |  |  | 1,075,419 |  |  | $ | 7.08 |  |  |  | 6.15 |  |  | $ | 15,595,467 |
Restricted stock awards |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Restricted Stock Activity |
|  | Shares |  |  | Weighted Average Grant Date Fair Value Per Share |
Nonvested restricted stock at December 31, 2021 |  |  | 788,454 |  |  | $ | 16.81 |
Granted |  |  | 42,900 |  |  |  | 23.21 |
Vested |  |  | (29,400 | ) |  |  | 20.88 |
Shares forfeited |  |  | (4,587 | ) |  |  | 18.75 |
Nonvested restricted stock at March 31, 2022 |  |  | 797,367 |  |  | $ | 17.00 |

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