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Fair Value Measurements (Details) - Schedule of fair value measurement option for financial assets or liabilities - USD ($)
$ in Thousands
Sep. 30, 2021
Mar. 31, 2021
Liabilities:    
Secured convertible notes payable, net $ 13,148 $ 13,047
Unsecured convertible notes payable related party, net 5,691 5,501
Unsecured convertible note payable 2,182 1,976
Level 1 [Member]    
Liabilities:    
Secured convertible notes payable, net
Unsecured convertible notes payable related party, net
Unsecured convertible note payable
Level 2 [Member]    
Liabilities:    
Secured convertible notes payable, net
Unsecured convertible notes payable related party, net
Unsecured convertible note payable
Level 3 [Member]    
Liabilities:    
Secured convertible notes payable, net 19,421 20,228
Unsecured convertible notes payable related party, net 8,809 9,216
Unsecured convertible note payable $ 2,272 $ 2,167