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Fair Value Measurements (Details 3) - USD ($)
$ in Thousands
Sep. 30, 2020
Mar. 31, 2020
Assets:    
Cash and cash equivalents $ 20,744 $ 5,702
Restricted cash 235 6,735
Level 1 [Member]    
Assets:    
Cash and cash equivalents 20,744 5,702
Restricted cash 235 6,735
Liabilities:    
Notes payable
Senior secured convertible notes payable, net
Unsecured convertible notes payable related party, net  
Unsecured convertible notes payable, net
Level 2 [Member]    
Assets:    
Cash and cash equivalents
Restricted cash
Liabilities:    
Notes payable
Senior secured convertible notes payable, net
Unsecured convertible notes payable related party, net  
Unsecured convertible notes payable, net
Level 3 [Member]    
Assets:    
Cash and cash equivalents
Restricted cash
Liabilities:    
Notes payable 2,968 331
Senior secured convertible notes payable, net 15,104 9,254
Unsecured convertible notes payable related party, net 5,950 4,451
Unsecured convertible notes payable, net 1,758 1,338
Carrying Value [Member]    
Assets:    
Cash and cash equivalents 20,744 5,702
Restricted cash 235 6,735
Liabilities:    
Notes payable 2,968 331
Senior secured convertible notes payable, net 12,874 8,701
Unsecured convertible notes payable related party, net 5,300 5,114
Unsecured convertible notes payable, net $ 1,818 $ 1,539