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Summary of Significant Accounting Policies (Details 1) - USD ($)
$ in Thousands
Mar. 31, 2019
Mar. 31, 2018
Accounting Policies [Abstract]    
Accounts receivable, gross $ 4,318 $ 3,019
Less: Allowance for doubtful accounts 4 29
Accounts receivable, net $ 4,314 $ 2,990