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Subsequent Events	6 Months Ended
Subsequent Events	Sep. 30, 2018
Subsequent Events [Abstract]
Subsequent Events	20. Subsequent Events Acquisition On December 21, 2018, the Company completed the acquisition of Mechanical Power Conversion LLC, a privately held company operating as E&M Power and engaged in the design and manufacture of advanced power emulators (AC and DC) and custom power electronic products, based in Binghamton, New York. The assets and results of operations were not significant to the Company’s consolidated financial position or results of operations, and thus pro forma information is not presented.