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Intangible Assets, Amortization Expense (Details) - USD ($)
3 Months Ended 6 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Amortization expense for acquired intangible assets [Abstract]        
Amortization expense $ 145,000 $ 157,000 $ 290,000 $ 331,000
Estimated future amortization expense for intangible assets subject to amortization [Abstract]        
2017 - remaining six months 306,000   306,000  
2018 597,000   597,000  
2019 580,000   580,000  
2020 580,000   580,000  
2021 580,000   580,000  
Thereafter 1,673,000   1,673,000  
Total $ 4,316,000   $ 4,316,000