Unaudited Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Restricted Stock Issued in-Lieu of Cash Bonuses [Member] Common Stock [Member]	Restricted Stock Issued in-Lieu of Cash Bonuses [Member] Additional Paid-in Capital [Member]	Restricted Stock Issued in-Lieu of Cash Bonuses [Member] Treasury Stock [Member]	Restricted Stock Issued in-Lieu of Cash Bonuses [Member] AOCI Attributable to Parent [Member]	Restricted Stock Issued in-Lieu of Cash Bonuses [Member] Retained Earnings [Member]	Restricted Stock Issued in-Lieu of Cash Bonuses [Member]	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, 2021							27,988
Balance at Mar. 31, 2021							$ 280	$ 1,121,495	$ (3,593)	$ (277)	$ (1,001,313)	$ 116,592
Issuance of common stock - restricted shares, net of forfeited shares (in shares)							318
Issuance of common stock - restricted shares, net of forfeited shares							$ 3	(3)	0	0	0	0
Stock-based compensation expense							$ 0	1,292	0	0	0	1,292
Issuance of stock for 401(k) match (in shares)							7
Issuance of stock for 401(k) match							$ 0	112	0	0	0	112
Cumulative translation adjustment							0	0	0	(63)	0	(63)
Net loss							$ 0	0	0	0	(5,403)	(5,403)
Balance (in shares) at Jun. 30, 2021							28,726
Balance at Jun. 30, 2021							$ 287	1,128,961	(3,639)	(340)	(1,006,716)	118,553
Issuance of common stock - bonus payout (in shares)	111
Issuance of common stock - bonus payout	$ 1	$ 1,681	$ 0	$ 0	$ 0	$ 1,682
Issuance of stock for 401(k) match							$ 0	112	0	0	0	112
Neeltran acquisition (in shares)							302
Neeltran acquisition							$ 3	4,384	0	0	0	4,387
Repurchase of treasury stock							0	0	(46)	0	0	(46)
Cumulative translation adjustment							0	0	0	(63)	0	(63)
Net loss							$ 0	0	0	0	(5,403)	(5,403)
Balance (in shares) at Mar. 31, 2022							28,920
Balance at Mar. 31, 2022							$ 289	1,133,536	(3,639)	(291)	(1,020,506)	109,389
Issuance of common stock - restricted shares, net of forfeited shares (in shares)							(9)
Issuance of common stock - restricted shares, net of forfeited shares							$ 0	0	0	0	0	0
Stock-based compensation expense								1,033				1,033
Issuance of stock for 401(k) match (in shares)							28
Issuance of stock for 401(k) match								138				138
Cumulative translation adjustment										63		63
Net loss											(8,710)	(8,710)
Balance (in shares) at Jun. 30, 2022							28,939
Balance at Jun. 30, 2022							$ 289	1,134,707	$ (3,639)	(228)	(1,029,216)	101,913
Issuance of stock for 401(k) match								$ 138				138
Cumulative translation adjustment										$ 63		63
Net loss											$ (8,710)	$ (8,710)