Condensed Statements of Convertible Preferred Stock and Stockholders' Equity (Deficit) (Unaudited) - USD ($) $ in Thousands | Convertible Preferred Stock [Member] Preferred Stock [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | AOCI Attributable to Parent [Member] | Total |
Beginning balance at Dec. 31, 2020 | $ 12,451 | $ 1 | $ 303 | $ (14,960) | | $ (14,656) |
Beginning balance, shares at Dec. 31, 2020 | 3,535,469 | 2,233,139 | | | | |
Issuance of common stock upon exercise of stock options | | | 34 | | | 34 |
Issuance of common stock upon exercise of stock options, shares | | 50,058 | | | | |
Stock-based compensation expense | | | 8 | | | 8 |
Net loss | | | | (1,148) | | (1,148) |
Ending balance at Mar. 31, 2021 | $ 12,451 | $ 1 | 345 | (16,108) | | (15,762) |
Ending balance, shares at Mar. 31, 2021 | 3,535,469 | 2,283,197 | | | | |
Beginning balance at Dec. 31, 2020 | $ 12,451 | $ 1 | 303 | (14,960) | | (14,656) |
Beginning balance, shares at Dec. 31, 2020 | 3,535,469 | 2,233,139 | | | | |
Net loss | | | | | | (2,458) |
Ending balance at Jun. 30, 2021 | $ 12,451 | $ 1 | 357 | (17,418) | | (17,060) |
Ending balance, shares at Jun. 30, 2021 | 3,535,469 | 2,291,497 | | | | |
Beginning balance at Mar. 31, 2021 | $ 12,451 | $ 1 | 345 | (16,108) | | (15,762) |
Beginning balance, shares at Mar. 31, 2021 | 3,535,469 | 2,283,197 | | | | |
Issuance of common stock upon exercise of stock options | | | 5 | | | 5 |
Issuance of common stock upon exercise of stock options, shares | | 8,300 | | | | |
Stock-based compensation expense | | | 7 | | | 7 |
Net loss | | | | (1,310) | | (1,310) |
Ending balance at Jun. 30, 2021 | $ 12,451 | $ 1 | 357 | (17,418) | | (17,060) |
Ending balance, shares at Jun. 30, 2021 | 3,535,469 | 2,291,497 | | | | |
Beginning balance at Dec. 31, 2021 | | $ 1 | 36,632 | (21,284) | | 15,349 |
Beginning balance, shares at Dec. 31, 2021 | | 8,933,989 | | | | |
Issuance of common stock upon exercise of stock options | | | 26 | | | 26 |
Issuance of common stock upon exercise of stock options, shares | | 91,816 | | | | |
Issuance of restricted stock awards | | | 14 | | | 14 |
Issuance of restricted stock awards, shares | | 3,500 | | | | |
Stock-based compensation expense | | | 154 | | | 154 |
Net loss | | | | (3,003) | | (3,003) |
Ending balance at Mar. 31, 2022 | | $ 1 | 36,826 | (24,287) | | 12,540 |
Ending balance, shares at Mar. 31, 2022 | | 9,029,305 | | | | |
Beginning balance at Dec. 31, 2021 | | $ 1 | 36,632 | (21,284) | | $ 15,349 |
Beginning balance, shares at Dec. 31, 2021 | | 8,933,989 | | | | |
Issuance of common stock upon exercise of stock options, shares | | | | | | 129,374 |
Net loss | | | | | | $ (5,597) |
Ending balance at Jun. 30, 2022 | | $ 1 | 37,004 | (26,881) | (4) | 10,120 |
Ending balance, shares at Jun. 30, 2022 | | 9,066,863 | | | | |
Beginning balance at Mar. 31, 2022 | | $ 1 | 36,826 | (24,287) | | 12,540 |
Beginning balance, shares at Mar. 31, 2022 | | 9,029,305 | | | | |
Issuance of common stock upon exercise of stock options | | | 9 | | | 9 |
Issuance of common stock upon exercise of stock options, shares | | 37,558 | | | | |
Stock-based compensation expense | | | 169 | | | 169 |
Net loss | | | | (2,594) | | (2,594) |
Other comprehensive loss | | | | | (4) | (4) |
Ending balance at Jun. 30, 2022 | | $ 1 | $ 37,004 | $ (26,881) | $ (4) | $ 10,120 |
Ending balance, shares at Jun. 30, 2022 | | 9,066,863 | | | | |