Unaudited Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ 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, 2018	21,139
Balance at Mar. 31, 2018	$ 211	$ 1,041,113	$ (1,645)	$ 883	$ (988,333)	$ 52,229
Issuance of common stock - restricted shares (in shares)	276
Issuance of common stock - restricted shares	$ 3	(3)
Stock-based compensation expense		785				785
Issuance of stock for 401(k) match (in shares)	14
Issuance of stock for 401(k) match		85				85
Repurchase of treasury stock			(239)			(239)
Cumulative translation adjustment				(216)		(216)
Net loss					(4,737)	(4,737)
Balance (in shares) at Jun. 30, 2018	21,429
Balance at Jun. 30, 2018	$ 214	1,041,980	(1,884)	667	(993,037)	47,940
Cumulative impact of adoption of ASU No. 2014-09					33	33
Balance (in shares) at Mar. 31, 2019	21,652
Balance at Mar. 31, 2019	$ 216	1,044,622	(2,101)	(5)	(961,539)	81,193
Issuance of common stock - restricted shares (in shares)	174
Issuance of common stock - restricted shares	$ 2	(2)
Stock-based compensation expense		249				249
Issuance of stock for 401(k) match (in shares)	8
Issuance of stock for 401(k) match		81				81
Repurchase of treasury stock			(283)			(283)
Cumulative translation adjustment				418		418
Net loss					(3,539)	(3,539)
Issuance of common stock - warrant exercise (in shares)	23
Issuance of common stock - warrant exercise		294				294
Balance (in shares) at Jun. 30, 2019	21,857
Balance at Jun. 30, 2019	$ 218	$ 1,045,244	$ (2,384)	$ 413	$ (965,078)	$ 78,413