Intangible Assets, Amortization Expense (Details) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Amortization expense for acquired intangible assets [Abstract]
Amortization expense	$ 157,000	$ 170,000	$ 331,000	$ 350,000
Estimated future amortization expense for intangible assets subject to amortization [Abstract]
2016 - remaining six months	291,000		291,000
2017	580,000		580,000
2018	580,000		580,000
2019	580,000		580,000
2020	580,000		580,000
Thereafter	2,252,000		2,252,000
Total	$ 4,863,000		$ 4,863,000