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Leases (Details 3) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Leases Details 3      
Total lease liabilities $ 300    
Cash payment for amount included in the measurement of lease liabilities within operating cash flows $ 308 $ 0 $ 0
Weighted average remaining lease term (years) 3 years 14 months 30 days    
Weighted average discount rate 4.05%