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Business Segment and Geographic Reporting (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Business Segment and Geographic Reporting (Textual)        
Total revenues $ 8,964 $ 24,522 $ 80
One external customer [Member]        
Business Segment and Geographic Reporting (Textual)        
Total revenues $ 4,000   $ 9,100  
One external customer [Member] | Revenue [Member]        
Business Segment and Geographic Reporting (Textual)        
Concentration risk, percentage     10.00%