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Lease (Tables)
12 Months Ended
Mar. 31, 2020
Leases [Abstract]  
Schedule of supplemental information related to operating leases

   2020 
   $ 
     
Operating lease cost   991*
Weighted Average Remaining Lease Term - Operating leases   7.51 years 
Weighted Average Discount Rate - Operating leases   7.63%

 

*Included unconditional government subsidy and sublease income with total amount $289 for factory space and dormitories located in Shenzhen.
Schedule of minimum future annual payments under non-cancellable leases
   Operating
leases
 
   $ 
Year ending March 31,    
2021   888 
2022   933 
2023   908 
2024   - 
2025   - 
Thereafter   3,275 
Total undiscounted cash flows   6,004 
Less: imputed interest   (3,188)
Present value of lease liabilities   2,816