Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands |
Conversion of Series B Convertible Preferred Stock into Common Stock [Member]
Preferred Stock [Member]
Series C Convertible Preferred Stock [Member]
|
Conversion of Series B Convertible Preferred Stock into Common Stock [Member]
Preferred Stock [Member]
Series B Convertible Preferred Stock [Member]
|
Conversion of Series B Convertible Preferred Stock into Common Stock [Member]
Preferred Stock Additional Paid-in Capital [Member]
Series C Convertible Preferred Stock [Member]
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Conversion of Series B Convertible Preferred Stock into Common Stock [Member]
Preferred Stock Additional Paid-in Capital [Member]
Series B Convertible Preferred Stock [Member]
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Conversion of Series B Convertible Preferred Stock into Common Stock [Member]
Common Stock [Member]
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Conversion of Series B Convertible Preferred Stock into Common Stock [Member]
Common Stock, Additional Paid-in Capital [Member]
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Conversion of Series B Convertible Preferred Stock into Common Stock [Member]
Retained Earnings [Member]
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Conversion of Series B Convertible Preferred Stock into Common Stock [Member] |
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Preferred Stock [Member]
Series C Convertible Preferred Stock [Member]
|
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Preferred Stock [Member]
Series B Convertible Preferred Stock [Member]
|
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Preferred Stock Additional Paid-in Capital [Member]
Series C Convertible Preferred Stock [Member]
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Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Preferred Stock Additional Paid-in Capital [Member]
Series B Convertible Preferred Stock [Member]
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Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Common Stock [Member]
|
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Common Stock, Additional Paid-in Capital [Member]
|
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Retained Earnings [Member]
|
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] |
Preferred Stock [Member]
Series C Convertible Preferred Stock [Member]
|
Preferred Stock [Member]
Series B Convertible Preferred Stock [Member]
|
Preferred Stock Additional Paid-in Capital [Member]
Series C Convertible Preferred Stock [Member]
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Preferred Stock Additional Paid-in Capital [Member]
Series B Convertible Preferred Stock [Member]
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Common Stock [Member] |
Common Stock, Additional Paid-in Capital [Member] |
Retained Earnings [Member] |
Total |
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Balance (in shares) at Dec. 31, 2019 | 0 | 1,000 | 9,131,000 | |||||||||||||||||||||
Balance at Dec. 31, 2019 | $ 0 | $ 0 | $ 0 | $ 671 | $ 1,644 | $ 104,912 | $ (94,071) | $ 13,156 | ||||||||||||||||
Issuance of common stock, shares (in shares) | 0 | 0 | 1,328,000 | |||||||||||||||||||||
Issuance of common stock | $ 0 | $ 0 | 0 | 0 | $ 239 | 4,426 | 0 | 4,665 | ||||||||||||||||
Issuance of common stock and warrants, shares (in shares) | 0 | 0 | 31,575,000 | |||||||||||||||||||||
Issuance of common stock and warrants | $ 0 | $ 0 | 0 | 0 | $ 5,684 | 23,991 | 0 | 29,675 | ||||||||||||||||
Allocation of common stock proceeds to warrant liability | $ 0 | $ 0 | 0 | 0 | $ 0 | (8,196) | 0 | (8,196) | ||||||||||||||||
Issuance of Series C convertible preferred stock and warrants (in shares) | 5,000 | 0 | 0 | |||||||||||||||||||||
Issuance of Series C convertible preferred stock and warrants, net of issuance costs of $260 | $ 0 | $ 0 | 5,165 | 0 | $ 0 | 0 | 0 | 5,165 | ||||||||||||||||
Allocation of Series C convertible preferred stock to beneficial conversion feature and warrant liability | 0 | 0 | (4,243) | 0 | 0 | 1,769 | 0 | (2,474) | ||||||||||||||||
Deemed dividend on Series C convertible preferred stock | 0 | 0 | 4,503 | 0 | 0 | (4,503) | 0 | 0 | ||||||||||||||||
Conversion of Series B convertible preferred stock to common stock | $ 0 | $ 0 | $ 0 | $ (50) | $ 2 | $ 48 | $ 0 | $ 0 | $ 0 | $ 0 | (5,425) | 0 | $ 976 | 4,449 | 0 | 0 | ||||||||
Conversion of Series B convertible preferred stock to common stock (in shares) | 0 | 15,000 | 50.000 | (5,000) | 0 | 5,425,000 | ||||||||||||||||||
Common stock issued for option exercises (in shares) | 0 | 0 | 225,000 | |||||||||||||||||||||
Common stock issued for option exercises | $ 0 | $ 0 | 0 | 0 | $ 41 | 501 | 0 | 542 | ||||||||||||||||
Shares withheld related to cashless exercise of options and taxes (in shares) | 0 | 0 | (149,000) | |||||||||||||||||||||
Shares withheld related to cashless exercise of options and taxes | $ 0 | $ 0 | 0 | 0 | $ (27) | (529) | 0 | (556) | ||||||||||||||||
Compensation cost for stock options granted | 0 | 0 | 3,019 | 0 | 3,019 | |||||||||||||||||||
Net loss | $ 0 | $ 0 | 0 | 0 | $ 0 | 0 | (17,828) | (17,828) | ||||||||||||||||
Balance (in shares) at Dec. 31, 2020 | 0 | 1,000 | 47,550,000 | |||||||||||||||||||||
Balance at Dec. 31, 2020 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 9,732 | $ 3,271 | $ 13,003 | $ 0 | $ 0 | 0 | 621 | $ 8,559 | 129,887 | (111,899) | 27,168 | ||||||||
Issuance of common stock and warrants, shares (in shares) | 0 | 0 | 41,211,000 | |||||||||||||||||||||
Issuance of common stock and warrants | $ 0 | $ 0 | 0 | 0 | $ 7,418 | 62,250 | 0 | $ 69,668 | ||||||||||||||||
Conversion of Series B convertible preferred stock to common stock | $ 0 | $ 0 | $ 0 | $ (39) | $ 2 | $ 37 | $ 0 | $ 0 | ||||||||||||||||
Conversion of Series B convertible preferred stock to common stock (in shares) | 0 | 0 | 11,000 | 39.000 | ||||||||||||||||||||
Common stock issued for option exercises (in shares) | 0 | 0 | 699,000 | 699,000 | ||||||||||||||||||||
Common stock issued for option exercises | $ 0 | $ 0 | 0 | 0 | $ 126 | 1,598 | 0 | $ 1,724 | ||||||||||||||||
Shares withheld related to cashless exercise of options and taxes (in shares) | 0 | 0 | (298,000) | |||||||||||||||||||||
Shares withheld related to cashless exercise of options and taxes | $ 0 | $ 0 | 0 | 0 | $ (54) | (1,852) | 0 | (1,906) | ||||||||||||||||
Compensation cost for stock options granted | 0 | 0 | 0 | 0 | 0 | 5,267 | 0 | 5,267 | ||||||||||||||||
Net loss | $ 0 | $ 0 | 0 | 0 | $ 0 | 0 | (20,606) | $ (20,606) | ||||||||||||||||
Issuance of common stock upon warrant exercise (in shares) | 0 | 0 | 37,451,000 | 37,451,000 | ||||||||||||||||||||
Issuance of common stock upon warrant exercise | $ 0 | $ 0 | 0 | 0 | $ 6,741 | 37,077 | 0 | $ 43,818 | ||||||||||||||||
Balance (in shares) at Dec. 31, 2021 | 0 | 1,000 | 126,624,000 | |||||||||||||||||||||
Balance at Dec. 31, 2021 | $ 0 | $ 0 | $ 0 | $ 582 | $ 22,792 | $ 243,996 | $ (129,234) | $ 138,136 |