Income Taxes - Reconciliation and Components (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Reconciliation of income tax (benefit) provision to taxes computed at U.S. federal statutory rates
Benefit for income taxes at statutory rates	$ (1,634)	$ (1,720)	$ (1,778)
Change in federal tax rate		4,134
State income taxes net of federal benefit	(620)	(255)	(124)
Impairment charges			737
Tax credits	(343)	(567)	(125)
Compensation charges	199	(324)	29
Change in valuation allowance	2,385	(3,153)	1,148
Other	49	67	69
Provision (benefit) for income taxes on continuing operations	36	(1,818)	$ (44)
Deferred tax assets:
Net operating losses	5,335	2,853
Capitalized R&D	2,347	2,734
Credit carry forwards	2,806	2,043
Deferred compensation and payroll	1,655	1,603
Bad debt allowance and other reserves	618	567
Deferred rent	202	235
Property and equipment	139	844
Other, net	309	203
Total deferred tax assets	13,411	11,082
Valuation allowance	(12,250)	(9,814)
Total deferred tax assets, net of valuation allowance	1,161	1,268
Deferred tax liabilities:
Acquired intangibles	(759)	(866)
Goodwill	(467)	(467)
Total deferred tax liabilities	(1,226)	(1,333)
Net deferred tax liabilities	$ (65)	$ (65)