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Summary of Significant Accounting Policies (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Mar. 31, 2018
Accounting Policies [Abstract]    
Accounts receivable, gross $ 3,733 $ 3,019
Less: Allowance for doubtful accounts (19) (29)
Accounts receivable, net $ 3,714 $ 2,990