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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
Treasury Stock [Member]
AOCI Attributable to Parent [Member]
Retained Earnings [Member]
Total
Balance (in shares) at Mar. 31, 2020 22,902,000          
Balance at Mar. 31, 2020 $ 229 $ 1,053,507 $ (2,666) $ (216) $ (978,635) $ 72,219
Exercise of stock options (in shares) 3,000          
Exercise of stock options $ 0 63 0 0 0 63
Issuance of common stock - ESPP (in shares) 15,000          
Issuance of common stock - ESPP   215       215
Issuance of common stock - restricted shares (in shares) 494,000          
Issuance of common stock - restricted shares $ 5 (5)        
Stock-based compensation expense   3,485       3,485
Issuance of stock for 401(k) match (in shares) 30,000          
Issuance of stock for 401(k) match   366       366
Issuance of common stock - equity offering (in shares) 3,670,000          
Issuance of common stock - equity offering $ 37 51,440 0 0 0 51,477
Issuance of common stock - NEPSI acquisition (in shares) 874,000          
Issuance of common stock - NEPSI acquisition $ 9 12,424 0 0 0 12,433
Repurchase of treasury stock     (927)     (927)
Cumulative translation adjustment       (61)   (61)
Net loss         (22,678) $ (22,678)
Issuance of stock for 401(k) match (in shares) 30,000          
Balance (in shares) at Mar. 31, 2021 27,988,000         27,593,400
Balance at Mar. 31, 2021 $ 280 1,121,495 (3,593) (277) (1,001,313) $ 116,592
Exercise of stock options (in shares)           (0)
Issuance of common stock - ESPP (in shares) 28,000          
Issuance of common stock - ESPP $ 0 241 0 0 0 $ 241
Issuance of common stock - restricted shares (in shares) 404,000          
Issuance of common stock - restricted shares $ 4 (4)        
Stock-based compensation expense   4,661       4,661
Issuance of stock for 401(k) match (in shares) 40,000          
Issuance of stock for 401(k) match   481       481
Issuance of common stock - NEPSI acquisition (in shares) 302,000          
Issuance of common stock - NEPSI acquisition $ 3 4,384       4,387
Repurchase of treasury stock $ 0 0 (46) 0 0 (46)
Cumulative translation adjustment       (14)   (14)
Net loss         (19,193) (19,193)
Issuance of common stock - Bonus payments (in shares) 158,000          
Issuance of common stock - Bonus payments $ 2 2,278 0 0 0 $ 2,280
Issuance of stock for 401(k) match (in shares) 40,000          
Balance (in shares) at Mar. 31, 2022 28,920,000         28,522,359
Balance at Mar. 31, 2022 $ 289 $ 1,133,536 $ (3,639) $ (291) $ (1,020,506) $ 109,389