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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, 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, RSU, and purchase plans, Shares   1   0    
Stock-based compensation expense 475 $ 0 475 $ 0 0 0
Stock-based compensation expense, Shares   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    
Beginning balance at Mar. 31, 2024 3,601 $ 10 343,261 $ (1) (339,669) 0
Beginning balance, Shares at Mar. 31, 2024   10,078   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, RSU, and purchase plans, Shares   1   0    
Issuance of common stock from exercise of pre-funded warrants 1 1 0 0 0 0
Issuance of common stock from exercise of pre-funded warrants, Shares   1,379   0    
Issuance of common stock from public offering, net $ 6,248 $ 3 $ 6,245 $ 0 $ 0 $ 0
Issuance of common stock from public offering, Shares   2,915   0    
Stock-based compensation expense 156 $ 0 156 $ 0 0 0
Stock-based compensation expense, Shares   0   0    
Net loss (3,344) $ 0 0 $ 0 (3,344) 0
Ending balance at Jun. 30, 2024 $ 6,662 $ 14 $ 349,662 $ (1) $ (343,013) $ 0
Ending balance, Shares at Jun. 30, 2024   14,373   0