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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2024
Schedule of share repurchase program | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Year Ended
​ | ​ | ​ | December 31,
(In thousands, except share and per share data) | ​ | ​ | 2024 | ​ | ​ | 2023
Number of shares repurchased | ​ | ​ | 195,518 | ​ | ​ | —
Total share repurchased cost | ​ | $ | 3,508 | ​ | $ | —
Average total cost per repurchased share | ​ | $ | 17.94 | ​ | $ | —
Schedule of allocation of total stock-based compensation expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Year Ended
​ | December 31,
(In thousands) | 2024 |  | 2023 |  | 2022
Cost of revenue | $ | 365 | ​ | $ | 420 | ​ | $ | 367
Sales and marketing expenses | ​ | 2,413 | ​ | ​ | 2,985 | ​ | ​ | 4,060
Research and development expenses | ​ | 157 | ​ | ​ | 133 | ​ | ​ | 226
Reimbursement, general and administrative expenses | ​ | 4,884 | ​ | ​ | 4,009 | ​ | ​ | 4,947
Total stock-based compensation expense | $ | 7,819 | ​ | $ | 7,547 | ​ | $ | 9,600
Schedule of estimated fair values and assumptions for stock options granted | ​
​ | ​ | ​
​ |  | 2022
Expected term |  | 4.5 years
Expected volatility |  | 59.2%
Risk-free interest rate |  | 4.3%
Expected dividend yield |  | 0%
Fair value on the date of grant |  | $ 8.11
Schedule of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ | Weighted- | ​ | Weighted- | ​ | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | Average | ​ | Aggregate
​ | ​ | Options | ​ | Exercise Price | ​ | Remaining | ​ | Intrinsic
(In thousands except options and per share data) | ​ | Outstanding | ​ | Per Share (1) | ​ | Contractual Life | ​ | Value (2)
Balance at December 31, 2021 | ​ | 915,224 | ​ | $ | 39.33 | ​ | 5.0 years | ​ | $ | 2,068
Granted | ​ | 47,280 | ​ | $ | 6.17 | ​ | ​ | ​ | ​ | ​
Exercised | ​ | (90,878) | ​ | $ | 1.68 | ​ | ​ | ​ | $ | 916
Forfeited | ​ | (92,981) | ​ | $ | 36.28 | ​ | ​ | ​ | ​ | ​
Cancelled/Expired | ​ | (163,338) | ​ | $ | 37.65 | ​ | ​ | ​ | ​ | ​
Balance at December 31, 2022 | ​ | 615,307 | ​ | $ | 43.25 | ​ | 4.7 years | ​ | $ | 164
Exercised | ​ | (4,625) | ​ | $ | 2.97 | ​ | ​ | ​ | $ | 98
Forfeited | ​ | (25,045) | ​ | $ | 47.54 | ​ | ​ | ​ | ​ | ​
Cancelled/Expired | ​ | (155,677) | ​ | $ | 50.72 | ​ | ​ | ​ | ​ | ​
Balance at December 31, 2023 | ​ | 429,960 | ​ | $ | 40.74 | ​ | 3.8 years | ​ | $ | 223
Exercised | ​ | (2,571) | ​ | $ | 9.40 | ​ | ​ | ​ | $ | 18
Cancelled/Expired | ​ | (32,518) | ​ | $ | 43.63 | ​ | ​ | ​ | ​ | ​
Balance at December 31, 2024 | ​ | 394,871 | ​ | $ | 40.70 | ​ | 2.8 years | ​ | $ | 309
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Options exercisable at December 31, 2024 | ​ | 386,990 | ​ | $ | 41.36 | ​ | 2.8 years | ​ | $ | 238
​
(1) | The exercise price of each option granted during the periods shown was equal to the market price of the underlying stock on the date of grant.
(2) | The aggregate intrinsic value of options exercised represents the difference between the exercise price of the option and the closing stock price of our common stock on the date of exercise. The aggregate intrinsic value of options outstanding represents the difference between the exercise price of the option and the closing stock price of our common stock on the last trading day of the period.
Schedule of non-vested stock options | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended
​ | ​ | December 31,
Number of: | ​ | 2024 | ​ | 2023
Non-vested options, beginning of the year | ​ | ​ | 43,503 | ​ | ​ | 179,944
Non-vested options, end of the year | ​ | ​ | 7,881 | ​ | ​ | 43,503
Vested options, end of the year | ​ | ​ | 386,990 | ​ | ​ | 386,457
​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended
​ | ​ | December 31,
Weighted-average grant date fair value of: | ​ | 2024 | ​ | 2023
Non-vested options, beginning of the year | ​ | $ | 13.57 | ​ | $ | 16.24
Non-vested options, end of the year | ​ | ​ | 4.23 | ​ | ​ | 13.57
Vested options, end of the year | ​ | ​ | 16.52 | ​ | ​ | 16.51
Forfeited options, during the year | ​ | ​ | — | ​ | ​ | 18.36
Time-Based Restricted Stock Units |
Schedule of stock-settled restricted stock unit activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted- | ​ | ​ | ​
​ |  | ​ |  | Average Grant |  | Aggregate
​ | ​ | Units | ​ | Date Fair Value | ​ | Intrinsic
(In thousands except unit and per unit data) | ​ | Outstanding | ​ | Per Unit | ​ | Value (1)
Balance at December 31, 2021 | ​ | 259,147 | ​ | $ | 42.32 | ​ | $ | 4,932
Granted | ​ | 539,525 | ​ | $ | 15.03 | ​ | ​ | ​
Vested | ​ | (123,528) | ​ | $ | 43.20 | ​ | ​ | ​
Cancelled | ​ | (84,602) | ​ | $ | 26.91 | ​ | ​ | ​
Balance at December 31, 2022 | ​ | 590,542 | ​ | $ | 19.42 | ​ | $ | 6,779
Granted | ​ | 398,698 | ​ | $ | 15.52 | ​ | ​ | ​
Vested | ​ | (270,651) | ​ | $ | 20.18 | ​ | ​ | ​
Cancelled | ​ | (129,447) | ​ | $ | 19.79 | ​ | ​ | ​
Balance at December 31, 2023 | ​ | 589,142 | ​ | $ | 16.35 | ​ | $ | 8,425
Granted | ​ | 541,547 | ​ | $ | 13.82 | ​ | ​ | ​
Vested | ​ | (281,917) | ​ | $ | 17.38 | ​ | ​ | ​
Cancelled | ​ | (120,346) | ​ | $ | 14.78 | ​ | ​ | ​
Balance at December 31, 2024 | ​ | 728,426 | ​ | $ | 14.33 | ​ | $ | 12,478
​
(1) | The aggregate intrinsic value of time-based restricted stock units outstanding was based on our closing stock price on the last trading day of the period.
Performance-based stock-settled restricted stock units |
Schedule of stock-settled restricted stock unit activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted- | ​ | ​ | ​
​ |  | ​ |  | Average Grant |  | Aggregate
​ | ​ | PSUs | ​ | Date Fair Value | ​ | Intrinsic
(In thousands except unit and per unit data) | ​ | Outstanding | ​ | Per Unit | ​ | Value (1)
Balance at December 31, 2021 | ​ | 54,317 | ​ | $ | 50.22 | ​ | $ | 1,034
Granted | ​ | 131,710 | ​ | $ | 18.54 | ​ | ​ | ​
Vested | ​ | (4,407) | ​ | $ | 12.31 | ​ | ​ | ​
Cancelled | ​ | (26,002) | ​ | $ | 42.53 | ​ | ​ | ​
Balance at December 31, 2022 | ​ | 155,618 | ​ | $ | 25.05 | ​ | $ | 1,786
Granted | ​ | 123,575 | ​ | $ | 15.28 | ​ | ​ | ​
Vested | ​ | (13,842) | ​ | $ | 42.70 | ​ | ​ | ​
Cancelled | ​ | (67,119) | ​ | $ | 21.50 | ​ | ​ | ​
Balance at December 31, 2023 | ​ | 198,232 | ​ | $ | 18.93 | ​ | $ | 2,785
Granted | ​ | 223,762 | ​ | $ | 13.76 | ​ | ​ | ​
Vested | ​ | (44,162) | ​ | $ | 27.31 | ​ | ​ | ​
Cancelled | ​ | (104,913) | ​ | $ | 14.14 | ​ | ​ | ​
Balance at December 31, 2024 | ​ | 272,919 | ​ | $ | 15.19 | ​ | $ | 4,675
​
(1) | The aggregate intrinsic value of performance-based restricted stock units outstanding was based on our closing stock price on the last trading day of the period

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