Property and Equipment (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Mar. 31, 2019
Property, Plant and Equipment [Line Items]
Depreciation	$ 600,000	$ 700,000	$ 1,300,000	$ 1,400,000
Impairment of long-lived assets	0		0	$ 531,000
Property and equipment, net	8,649,000		$ 8,649,000		$ 9,830,000
Network Sites and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Estimated useful life			5 years
Network Sites and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Estimated useful life			10 years
Furniture and Fixtures and Other Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Estimated useful life			2 years
Furniture and Fixtures and Other Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Estimated useful life			5 years
Computer Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Estimated useful life			5 years
Computer Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Estimated useful life			7 years
Computer Software [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Estimated useful life			1 year
Computer Software [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Estimated useful life			7 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Estimated useful life			10 years
TeamConnect LLC [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, net	$ 72,000		$ 72,000
Ownership percentage	19.50%		19.50%