General form of registration statement for all companies including face-amount certificate companies

COMMON STOCK AND CONVERTIBLE PREFERRED STOCK (Details 3)

v3.21.2
COMMON STOCK AND CONVERTIBLE PREFERRED STOCK (Details 3) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Warrant Liability at beginning $ 7,632 $ 764 $ 2,272
(Decrease) increase in fair value   3,345 (1,508)
Fair value of warrants at issuance   3,523  
Warrant Liability at beginning   7,632 764
Airspan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Warrant Liability at beginning 7,632    
(Decrease) increase in fair value 4,517    
Fair value of warrants at issuance 142    
Warrant Liability at beginning 12,291 7,632  
Series D 1 Warrants [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Warrant Liability at beginning 4,109 764 2,272
(Decrease) increase in fair value   3,345 (1,508)
Fair value of warrants at issuance    
Warrant Liability at beginning   4,109 764
Series D 1 Warrants [Member] | Airspan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Warrant Liability at beginning 4,109    
(Decrease) increase in fair value 3,541    
Fair value of warrants at issuance    
Warrant Liability at beginning 7,650 4,109  
Series H Warrants [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Warrant Liability at beginning 3,523
(Decrease) increase in fair value  
Fair value of warrants at issuance   3,523  
Warrant Liability at beginning   3,523
Series H Warrants [Member] | Airspan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Warrant Liability at beginning 3,523    
(Decrease) increase in fair value 976    
Fair value of warrants at issuance 142    
Warrant Liability at beginning $ 4,641 $ 3,523