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Net Income (Loss) Per Common Share (Tables)
 6 Months Ended
Jun. 30, 2022
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method
The following table summarizes the computation of basic and diluted net loss per common share.
 Three Months Ended
June 30,		Six Months Ended
June 30,
 2022202120222021
Numerator:
Net loss$(8,567)$(5,391)$(11,869)$(10,304)
Less: Preferred stock cumulative dividends and deemed dividends(2,658)(2,211)(5,196)(16,740)
Numerator for basic and diluted undistributed net loss per common share (1)$(11,225)$(7,602)$(17,065)$(27,044)
Denominator:
Weighted average common shares outstanding43,885 43,067 43,599 42,952 
Adjustment for unvested restricted common stock(1,070)(524)(844)(450)
Adjustment for 2021 Warrants outstanding (2)1,893 1,897 1,894 1,059 
Shares used to calculate net loss per share, basic and diluted44,708 44,440 44,649 43,561 
Per common share net loss:
Basic and diluted net loss per common share$(0.25)$(0.17)$(0.38)$(0.62)
Cash dividends declared per common share$— $— $— $— 
_______________________________
(1) Preferred Stock does not participate in losses.
(2) Weighted average 2021 Warrants outstanding are included in shares outstanding for calculation of basic earnings per share because they are exercisable at an exercise price of $0.01 per share, subject to certain adjustments (see Note 15).
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share
The following table presents securities that could be potentially dilutive in the future that were excluded from the calculation of diluted net loss per common share because they had an anti-dilutive effect.
Three Months Ended
June 30,		Six Months Ended
June 30,
2022202120222021
Options546 825 573 843 
2019 Warrants1,500 1,500 1,500 1,500 
2,046 2,325 2,073 2,343