Segment Information (Details Textual) $ in Millions	6 Months Ended
	Sep. 30, 2018 USD ($) Segment Customer
Segment Reporting Information [Line Items]
Number of reportable segments (segments)	3
Intersegment sales | $	$ 0
Number of operating segments aggregated (segments)	0
Number of customer representing 10 percent or more of revenue (customers) | Customer	0
Quarterly Financial Information, Segment Reporting, Segment Assets, Material Change	0