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Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Common Stock | Additional Paid-In Capital | (Accumulated Deficit) Retained Earnings | Total
--- | --- | --- | --- | ---
Balances at the beginning at Dec. 31, 2021 | $ 20 | $ 119,962 | $ 8,245 | $ 128,227
Balances at the beginning (in shares) at Dec. 31, 2021 | 19,877,786 |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |
Stock-based compensation |  | 5,121 |  | 5,121
Exercise of common stock options and vesting of performance and restricted stock units |  | 152 |  | 152
Exercise of common stock options and vesting of performance and restricted stock units (in shares) | 169,085 |  |  |
Common shares issued for employee stock purchase plan |  | 824 |  | 824
Common shares issued for employee stock purchase plan (in shares) | 85,274 |  |  |
Net loss for the period |  |  | (20,208) | (20,208)
Balances at the end at Jun. 30, 2022 | $ 20 | 126,059 | (11,963) | 114,116
Balances at the end (in shares) at Jun. 30, 2022 | 20,132,145 |  |  |
Balances at the beginning at Mar. 31, 2022 | $ 20 | 122,281 | (7,323) | 114,978
Balances at the beginning (in shares) at Mar. 31, 2022 | 19,939,843 |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |
Stock-based compensation |  | 2,892 |  | 2,892
Exercise of common stock options and vesting of performance and restricted stock units |  | 62 |  | 62
Exercise of common stock options and vesting of performance and restricted stock units (in shares) | 107,028 |  |  |
Common shares issued for employee stock purchase plan |  | 824 |  | 824
Common shares issued for employee stock purchase plan (in shares) | 85,274 |  |  |
Net loss for the period |  |  | (4,640) | (4,640)
Balances at the end at Jun. 30, 2022 | $ 20 | 126,059 | (11,963) | 114,116
Balances at the end (in shares) at Jun. 30, 2022 | 20,132,145 |  |  |
Balances at the beginning at Dec. 31, 2022 | $ 20 | 131,001 | (9,621) | 121,400
Balances at the beginning (in shares) at Dec. 31, 2022 | 20,252,677 |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |
Stock-based compensation |  | 3,831 |  | 3,831
Exercise of common stock options and vesting of performance and restricted stock units |  | 11 |  | 11
Exercise of common stock options and vesting of performance and restricted stock units (in shares) | 209,809 |  |  |
Sale of common stock from follow-on public offering, net of offering expenses | $ 3 | 34,622 |  | 34,625
Sale of common stock from follow-on public offering, net of offering expenses (in shares) | 2,875,000 |  |  |
Common shares issued for employee stock purchase plan |  | 882 |  | 882
Common shares issued for employee stock purchase plan (in shares) | 120,816 |  |  |
Net loss for the period |  |  | (1,986) | (1,986)
Balances at the end at Jun. 30, 2023 | $ 23 | 170,347 | (11,607) | 158,763
Balances at the end (in shares) at Jun. 30, 2023 | 23,458,302 |  |  |
Balances at the beginning at Mar. 31, 2023 | $ 23 | 167,646 | (11,507) | 156,162
Balances at the beginning (in shares) at Mar. 31, 2023 | 23,235,065 |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |
Stock-based compensation |  | 1,808 |  | 1,808
Exercise of common stock options and vesting of performance and restricted stock units |  | 11 |  | 11
Exercise of common stock options and vesting of performance and restricted stock units (in shares) | 102,421 |  |  |
Common shares issued for employee stock purchase plan |  | 882 |  | 882
Common shares issued for employee stock purchase plan (in shares) | 120,816 |  |  |
Net loss for the period |  |  | (100) | (100)
Balances at the end at Jun. 30, 2023 | $ 23 | $ 170,347 | $ (11,607) | $ 158,763
Balances at the end (in shares) at Jun. 30, 2023 | 23,458,302 |  |  |

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