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Unaudited Condensed Consolidated Statements of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Treasury Stock [Member]
Accumulated Deficit [Member]
Accumulated Other Comprehensive Income [Member]
Beginning balance at Mar. 31, 2022 $ 30,209 $ 9 $ 337,940 $ (1) $ (307,739) $ 0
Beginning balance, Shares at Mar. 31, 2022   8,711   0    
Issuance of common stock under employee and director stock option, RSU, and purchase plans 0 $ 0 0 $ 0 0 0
Issuance of common stock under employee and director stock option, restricted stock units, and purchase plans, Shares   1        
Stock-based compensation expense 660 $ 0 660 0 0 0
Net loss (3,215) 0 0 0 (3,215) 0
Ending balance at Jun. 30, 2022 27,654 $ 9 338,600 $ (1) (310,954) 0
Ending balance, Shares at Jun. 30, 2022   8,712   0    
Beginning balance at Mar. 31, 2023 15,329 $ 9 340,317 $ (1) (324,998) 2
Beginning balance, Shares at Mar. 31, 2023   8,717   0    
Issuance of common stock under employee and director stock option, RSU, and purchase plans 0 $ 0 0 $ 0 0 0
Issuance of common stock under employee and director stock option, restricted stock units, and purchase plans, Shares   1        
Stock-based compensation expense 475 $ 0 475 0 0 0
Net loss (4,028) 0 0 0 (4,028) 0
Ending balance at Jun. 30, 2023 $ 11,776 $ 9 $ 340,792 $ (1) $ (329,026) $ 2
Ending balance, Shares at Jun. 30, 2023   8,718   0