Quarterly report pursuant to Section 13 or 15(d)

CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY

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CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Preferred Stock
Convertible Preferred Stock
Common Shares
Additional Paid-in Capital
Accumulated Deficit
Cumulative Effect, Period of Adoption, Adjustment
Accumulated Deficit
Cumulative Effect, Period of Adoption, Adjustment
Total
Balance at Dec. 31, 2020 $ 597 $ 1 $ 207,698   $ (200,383)   $ 7,316
Balance (in shares) at Dec. 31, 2020 250,000 8,402,250          
Issuance of common stock upon warrant exercise (in shares)   2,086,251          
Issuance of common stock upon warrant exercise     5,095       5,095
Warrants issued in connection with warrant exercise     567       567
Convertible preferred stock dividend $ 20   (20)       (20)
Stock-based compensation     254       254
Stock-based compensation (in shares)   643,700          
Release of vested restricted common stock (in shares)   352          
Net loss         (3,292)   (3,292)
Balance (in shares) at Mar. 31, 2021 250,000 11,132,553          
Balance at Mar. 31, 2021 $ 617 $ 1 213,594   (203,675)   9,920
Balance at Dec. 31, 2021   $ 2 228,578   (212,203)   16,377 [1]
Balance (in shares) at Dec. 31, 2021   15,819,059          
Stock-based compensation     480       480
Stock-based compensation (in shares) 0 1,067,400          
Restricted stock awards cancelled (in shares)   (8,663)          
Release of vested restricted common stock (in shares)   5,668          
Net loss         (3,904)   (3,904)
Balance (in shares) at Mar. 31, 2022   16,883,464          
Balance at Mar. 31, 2022   $ 2 $ 229,058 $ 33 $ (216,074) $ 33 $ 12,986
[1] The condensed consolidated balance sheet as of December 31, 2021 was derived from the audited consolidated balance sheet as of that date.