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Goodwill and Intangible Assets, Amortization Expense (Details) - USD ($)
3 Months Ended 6 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Amortization expense for acquired intangible assets [Abstract]        
Amortization expense $ 180,000 $ 145,000 $ 325,000 $ 290,000
Estimated future amortization expense for intangible assets subject to amortization [Abstract]        
2018 - remaining six months 394,000   394,000  
2019 787,000   787,000  
2020 721,000   721,000  
2021 616,000   616,000  
2022 580,000   580,000  
Thereafter 1,093,000   1,093,000  
Total $ 4,191,000   $ 4,191,000