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Fair Value Measurements (Details) - Schedule of fair value measurement option for financial assets or liabilities - USD ($)
$ in Thousands
Jun. 30, 2021
Mar. 31, 2021
Liabilities:    
Senior secured convertible notes payable, net $ 12,922 $ 13,047
Unsecured convertible notes payable related party, net 5,595 5,501
Unsecured convertible note payable 2,073 1,976
Level 1 [Member]    
Liabilities:    
Senior secured convertible notes payable, net
Unsecured convertible notes payable related party, net
Unsecured convertible note payable
Level 2 [Member]    
Liabilities:    
Senior secured convertible notes payable, net
Unsecured convertible notes payable related party, net
Unsecured convertible note payable
Level 3 [Member]    
Liabilities:    
Senior secured convertible notes payable, net 23,976 20,228
Unsecured convertible notes payable related party, net 10,146 9,216
Unsecured convertible note payable $ 2,339 $ 2,167