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Condensed Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Total
--- | --- | --- | --- | ---
Balances, shares (in shares) at Dec. 31, 2022 | 25,353,119 |  |  |
Balances at Dec. 31, 2022 | $ 25 | $ 116,187 | $ (103,134) | $ 13,078
Stock-based compensation, shares (in shares) | 0 |  |  |
Stock-based compensation | $ 0 | 1,657 | 0 | 1,657
Employee stock purchase plan (in shares) | 57,616 |  |  |
Employee stock purchase plan | $ 0 | 140 | 0 | 140
Stock option exercises, shares (in shares) | 202,126 |  |  |
Stock option exercises | $ 1 | 131 | 0 | 132
Net loss | $ 0 | 0 | 1,899 | 1,899
Balances, shares (in shares) at Jun. 30, 2023 | 25,561,994 |  |  |
Balances at Jun. 30, 2023 | $ 26 | 117,934 | (101,235) | $ 16,725
Shares withheld related to net share settlement of stock option exercises (in shares) | (50,867) |  |  | (50,867)
Shares withheld related to net share settlement of stock option exercises | $ 0 | (181) | 0 | $ (181)
Balances, shares (in shares) at Dec. 31, 2022 | 25,353,119 |  |  |
Balances at Dec. 31, 2022 | $ 25 | 116,187 | (103,134) | 13,078
Balances, shares (in shares) at Jun. 30, 2024 | 25,745,802 |  |  |
Balances at Jun. 30, 2024 | $ 26 | 121,358 | (107,922) | 13,462
Balances, shares (in shares) at Mar. 31, 2023 | 25,504,378 |  |  |
Balances at Mar. 31, 2023 | $ 26 | 117,009 | (105,794) | 11,241
Stock-based compensation | $ 0 | 785 | 0 | 785
Employee stock purchase plan (in shares) | 57,616 |  |  |
Employee stock purchase plan | $ 0 | 140 | 0 | 140
Net loss | $ 0 | 0 | 4,559 | 4,559
Balances, shares (in shares) at Jun. 30, 2023 | 25,561,994 |  |  |
Balances at Jun. 30, 2023 | $ 26 | 117,934 | (101,235) | 16,725
Balances, shares (in shares) at Dec. 31, 2023 | 25,688,062 |  |  |
Balances at Dec. 31, 2023 | $ 26 | 119,521 | (104,070) | 15,477
Stock-based compensation, shares (in shares) | 0 |  |  |
Stock-based compensation | $ 0 | 1,661 | 0 | 1,661
Employee stock purchase plan (in shares) | 55,240 |  |  |
Employee stock purchase plan | $ 0 | 169 | 0 | $ 169
Stock option exercises, shares (in shares) | 2,500 |  |  | 2,500
Stock option exercises | $ 0 | 7 | 0 | $ 7
Net loss | $ 0 | 0 | (3,852) | (3,852)
Balances, shares (in shares) at Jun. 30, 2024 | 25,745,802 |  |  |
Balances at Jun. 30, 2024 | $ 26 | 121,358 | (107,922) | 13,462
Balances, shares (in shares) at Mar. 31, 2024 | 25,690,562 |  |  |
Balances at Mar. 31, 2024 | $ 26 | 120,349 | (104,881) | 15,494
Stock-based compensation, shares (in shares) | 0 |  |  |
Stock-based compensation | $ 0 | 840 | 0 | 840
Employee stock purchase plan (in shares) | 55,240 |  |  |
Employee stock purchase plan | $ 0 | 169 | 0 | 169
Stock option exercises, shares (in shares) | 0 |  |  |
Stock option exercises | $ 0 | 0 | 0 | 0
Net loss | $ 0 | 0 | (3,041) | (3,041)
Balances, shares (in shares) at Jun. 30, 2024 | 25,745,802 |  |  |
Balances at Jun. 30, 2024 | $ 26 | $ 121,358 | $ (107,922) | $ 13,462

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