Supplementary Financial Information - Intangible Assets (Details) - USD ($)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Intangible Assets
Gross Carrying Amount	$ 13,826,000	$ 9,484,000
Accumulated Amortization	(7,689,000)	(6,198,000)
Net Book Value	6,137,000	3,286,000
Amortization expense	1,492,000	1,125,000	$ 726,000
Amortization recorded to cost of revenues	736,000	850,000	638,000
Amortization of intangible assets	757,000	275,000	$ 88,000
Net capitalized software development costs	$ 2,900,000	3,300,000
Useful life (in years)	5 years 3 months 18 days
Technology
Intangible Assets
Gross Carrying Amount	$ 1,856,000	1,856,000
Accumulated Amortization	(1,856,000)	(1,856,000)
Customer contracts / relationships
Intangible Assets
Gross Carrying Amount	4,250,000	750,000
Accumulated Amortization	(1,188,000)	(750,000)
Net Book Value	$ 3,062,000
Useful life (in years)	6 years
Trade names and non-compete agreements
Intangible Assets
Gross Carrying Amount	$ 1,320,000	1,110,000
Accumulated Amortization	(1,163,000)	(1,110,000)
Net Book Value	$ 157,000
Useful life (in years)	3 years
Capitalized software development costs
Intangible Assets
Gross Carrying Amount	$ 6,400,000	5,768,000
Accumulated Amortization	(3,482,000)	(2,482,000)
Net Book Value	2,918,000	3,286,000
Oracle ERP system design and implementation
Intangible Assets
Net capitalized software development costs	$ 1,900,000	$ 2,200,000
Useful life (in years)		10 years