Supplemental Disclosures of Cash Flow Information (Details) - USD ($)	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Supplemental Cash Flow Elements [Abstract]
Cash receipts for interest, net	$ (329,000)	$ (88,000)	$ (147,000)
Cash payments for income tax, net	409,000	(227,000)	19,000
Acquisition of property and equipment under lease obligations	0	64,000	21,000
Accrued capital expenditures	56,000	83,000	411,000
Accrued capitalized software development costs	$ 0	$ 201,000	$ 922,000
Leasehold improvements acquired under operating lease arrangement	62	95	35