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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' (DEFICIT) EQUITY - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-In Capital | Accumulated Other Comprehensive Loss | Accumulated Deficit | Treasury Stock
--- | --- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2022 |  | 72,817,887 |  |  |  |
Beginning balance at Dec. 31, 2022 | $ 145,700 | $ 7 | $ 561,390 | $ (7,246) | $ (408,451) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net loss | (36,829) |  |  |  | (36,829) |
Issuance of common stock to directors (in shares) |  | 6,713 |  |  |  |
Vesting of restricted stock units (in shares) |  | 111,296 |  |  |  |
Vesting of restricted stock units | (2,959) |  | (2,959) |  |  |
Exercise of stock options (in shares) |  | 19,483 |  |  |  |
Exercise of stock options | 131 |  | 131 |  |  |
Stock-based compensation expense | 11,056 |  | 11,056 |  |  |
Other comprehensive income (loss) | (700) |  |  | (700) |  |
Ending balance (in shares) at Mar. 31, 2023 |  | 72,955,379 |  |  |  |
Ending balance at Mar. 31, 2023 | 116,399 | $ 7 | 569,618 | (7,946) | (445,280) |
Beginning balance (in shares) at Dec. 31, 2023 |  | 73,366,766 |  |  |  |
Beginning balance at Dec. 31, 2023 | 52,341 | $ 7 | 595,781 | (23,555) | (519,892) | $ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net loss | (32,923) |  |  |  | (32,923) |
Issuance of common stock to directors (in shares) |  | 4,974 |  |  |  |
Vesting of restricted stock units (in shares) |  | 141,563 |  |  |  |
Vesting of restricted stock units | (2,862) |  | (2,862) |  |  |
Exercise of stock options (in shares) |  | 43,460 |  |  |  |
Exercise of stock options | 345 |  | 345 |  |  |
Repurchase of common stock (in shares) |  | (1,320,531) |  |  |  |
Repurchase of common stock | (50,019) |  |  |  |  | (50,019)
Stock-based compensation expense | 10,606 |  | 10,606 |  |  |
Other comprehensive income (loss) | $ 12,847 |  |  | 12,847 |  |
Ending balance (in shares) at Mar. 31, 2024 | 72,200,000 | 72,236,232 |  |  |  |
Ending balance at Mar. 31, 2024 | $ (9,665) | $ 7 | $ 603,870 | $ (10,708) | $ (552,815) | $ (50,019)

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