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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Income (Loss)
Retained Earnings
Total
Beginning Balance - Shares at Mar. 31, 2020 23,229,286        
Beginning Balance - Amount at Mar. 31, 2020 $ 23 $ 40,176 $ 71 $ 49,371 $ 89,641
Issuance of common stock under employee stock option plans, shares 566,677        
Issuance of common stock under employee stock option plans, amount $ 1 3,325     3,326
Stock-based compensation expense   2,101     2,101
Comprehensive loss:          
Net loss       (16,523) (16,523)
Net unrealized loss on available-for-sale investments     (66)   (66)
Ending Balance, Shares at Dec. 31, 2020 23,795,963        
Ending Balance, Amount at Dec. 31, 2020 $ 24 45,602 5 32,848 78,479
Beginning Balance - Shares at Sep. 30, 2020 23,641,426        
Beginning Balance - Amount at Sep. 30, 2020 $ 24 44,092 43 38,064 82,223
Issuance of common stock under employee stock option plans, shares 154,537        
Issuance of common stock under employee stock option plans, amount   817     817
Stock-based compensation expense   693     693
Comprehensive loss:          
Net loss       (5,216) (5,216)
Net unrealized loss on available-for-sale investments     (38)   (38)
Ending Balance, Shares at Dec. 31, 2020 23,795,963        
Ending Balance, Amount at Dec. 31, 2020 $ 24 45,602 5 32,848 78,479
Beginning Balance - Shares at Mar. 31, 2021 24,020,276        
Beginning Balance - Amount at Mar. 31, 2021 $ 24 47,722 (20) 27,866 75,592
Issuance of common stock under employee stock option plans, shares 462,276        
Issuance of common stock under employee stock option plans, amount   2,353     2,353
Stock-based compensation expense   2,279     2,279
Comprehensive loss:          
Net loss       (13,357) (13,357)
Net unrealized loss on available-for-sale investments     (60)   (60)
Ending Balance, Shares at Dec. 31, 2021 24,482,552        
Ending Balance, Amount at Dec. 31, 2021 $ 24 52,354 (80) 14,509 66,807
Beginning Balance - Shares at Sep. 30, 2021 24,328,128        
Beginning Balance - Amount at Sep. 30, 2021 $ 24 50,858 (51) 19,090 69,921
Issuance of common stock under employee stock option plans, shares 154,424        
Issuance of common stock under employee stock option plans, amount   756     756
Stock-based compensation expense   740     740
Comprehensive loss:          
Net loss       (4,581) (4,581)
Net unrealized loss on available-for-sale investments     (29)   (29)
Ending Balance, Shares at Dec. 31, 2021 24,482,552        
Ending Balance, Amount at Dec. 31, 2021 $ 24 $ 52,354 $ (80) $ 14,509 $ 66,807