Income Taxes - Reconciliation and Components (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Reconciliation of income tax (benefit) provision to taxes computed at U.S. federal statutory rates
Benefit for income taxes at statutory rates	$ (1,095)	$ (1,634)	$ (1,720)
Change in federal tax rate			4,134
State income taxes net of federal benefit	(198)	(620)	(255)
Tax credits	(658)	(343)	(567)
Compensation charges	151	199	(324)
Change in valuation allowance	1,913	2,385	(3,153)
Other	47	49	67
Provision (benefit) for income taxes	160	36	$ (1,818)
Deferred tax assets:
Net operating losses	4,284	5,335
Capitalized R&D	3,520	2,347
Credit carry forwards	3,510	2,806
Deferred compensation and payroll	2,304	1,655
Bad debt allowance and other reserves	656	618
Deferred rent		202
Operating leases	219
Property and equipment	60	139
Other, net	556	309
Total deferred tax assets	15,109	13,411
Valuation allowance	(14,163)	(12,250)
Total deferred tax assets, net of valuation allowance	946	1,161
Deferred tax liabilities:
Acquired intangibles	(596)	(759)
Goodwill	(540)	(467)
Total deferred tax liabilities	(1,136)	(1,226)
Net deferred tax liabilities	$ (190)	$ (65)