Goodwill and Intangible Assets, Intangible Assets Subject to Amortization (Details) - USD ($)	6 Months Ended
	Sep. 30, 2018	Mar. 31, 2018
Intangible assets subject to amortization [Abstract]
Gross Carrying Value	$ 7,084,000	$ 7,086,000
Accumulated Amortization	$ 3,704,000	3,320,000
Trademarks [Member]
Intangible assets subject to amortization [Abstract]
Weighted Average Amortization Period	9 years
Gross Carrying Value	$ 885,000	885,000
Accumulated Amortization	$ 392,000	316,000
Customer Relationships [Member]
Intangible assets subject to amortization [Abstract]
Weighted Average Amortization Period	13 years
Gross Carrying Value	$ 5,900,000	5,900,000
Accumulated Amortization	$ 3,195,000	2,937,000
Developed Technology [Member]
Intangible assets subject to amortization [Abstract]
Weighted Average Amortization Period	3 years
Gross Carrying Value	$ 299,000	301,000
Accumulated Amortization	$ 117,000	$ 67,000