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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
Accumulated Deficit
Beginning Balance at Dec. 31, 2020 $ 58,980 $ 13 $ 110,424 $ (51,457)
Beginning balance, shares at Dec. 31, 2020   12,830,598    
Exercise of employee stock options 27   27  
Exercise of employee stock options, shares   7,655    
Cashless exercise of warrants, shares   673,463    
Stock-based compensation 495   495  
Net loss (4,804)     (4,804)
Ending Balance at Mar. 31, 2021 54,698 $ 13 110,946 (56,261)
Ending balance, shares at Mar. 31, 2021   13,511,716    
Beginning Balance at Dec. 31, 2020 58,980 $ 13 110,424 (51,457)
Beginning balance, shares at Dec. 31, 2020   12,830,598    
Net loss (10,616)      
Ending Balance at Jun. 30, 2021 49,909 $ 14 111,968 (62,073)
Ending balance, shares at Jun. 30, 2021   14,079,057    
Beginning Balance at Mar. 31, 2021 54,698 $ 13 110,946 (56,261)
Beginning balance, shares at Mar. 31, 2021   13,511,716    
Exercise of employee stock options 15   15  
Exercise of employee stock options, shares   1,939    
Issuance of common stock upon vesting of restricted stock units, shares   5,000    
Exercise of cashless warrants   $ 1 (1)  
Cashless exercise of warrants, shares   560,402    
Stock-based compensation 1,008   1,008  
Net loss (5,812)     (5,812)
Ending Balance at Jun. 30, 2021 49,909 $ 14 111,968 (62,073)
Ending balance, shares at Jun. 30, 2021   14,079,057    
Beginning Balance at Dec. 31, 2021 41,548 $ 15 114,698 (73,165)
Beginning balance, shares at Dec. 31, 2021   14,754,447    
Exercise of employee stock options 1   1  
Exercise of employee stock options, shares   1,098    
Issuance of common stock under ESPP 11   11  
Issuance of common stock under ESPP, shares   5,716    
Stock-based compensation 1,055   1,055  
Net loss (2,567)     (2,567)
Ending Balance at Mar. 31, 2022 40,048 $ 15 115,765 (75,732)
Ending balance, shares at Mar. 31, 2022   14,761,261    
Beginning Balance at Dec. 31, 2021 $ 41,548 $ 15 114,698 (73,165)
Beginning balance, shares at Dec. 31, 2021   14,754,447    
Exercise of employee stock options, shares 1,098      
Net loss $ (5,602)      
Ending Balance at Jun. 30, 2022 38,207 $ 15 116,959 (78,767)
Ending balance, shares at Jun. 30, 2022   14,761,261    
Beginning Balance at Mar. 31, 2022 40,048 $ 15 115,765 (75,732)
Beginning balance, shares at Mar. 31, 2022   14,761,261    
Stock-based compensation 1,194   1,194  
Net loss (3,035)     (3,035)
Ending Balance at Jun. 30, 2022 $ 38,207 $ 15 $ 116,959 $ (78,767)
Ending balance, shares at Jun. 30, 2022   14,761,261