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Revenue (Details 1)
$ in Thousands
6 Months Ended
Sep. 30, 2019
USD ($)
Revenue from Contract with Customer [Abstract]  
Balance as of March 31, 2019 $ 950
Revenue recognized that was included in the contract liability at beginning of period (950)
Increase due to cash received, excluding amounts recognized as revenue during the period 855
Balance as of September 30, 2019 $ 855