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Revenue (Details 1)
$ in Thousands
12 Months Ended
Mar. 31, 2020
USD ($)
Revenue from Contract with Customer [Abstract]  
Balance as of April 1, 2018 $ 1,046
Revenue recognized that was included in the contract liability at beginning of period (1,046)
Increase due to cash received, excluding amounts recognized as revenue during the period 950
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 949
Balance as of March 31, 2020 $ 949