Quarterly report pursuant to Section 13 or 15(d)

Capital Structure - Warrants Liabilities - Lightning Systems (Details)

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Capital Structure - Warrants Liabilities - Lightning Systems (Details)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Feb. 28, 2021
USD ($)
Y
item
$ / shares
shares
Jun. 30, 2021
USD ($)
item
$ / shares
shares
Mar. 31, 2021
USD ($)
item
$ / shares
shares
Jun. 30, 2022
USD ($)
$ / shares
shares
Jun. 30, 2021
USD ($)
$ / shares
shares
Dec. 31, 2020
$ / shares
shares
Dec. 31, 2019
$ / shares
shares
Class of Warrant or Right [Line Items]              
Proceeds from exercise of common warrants | $       $ 0 $ 157    
Issuance of common stock warrants | $         $ 433    
Outstanding warrants              
Class of Warrant or Right [Line Items]              
Warrant exercise price (in dollars per share)       $ 11.50      
Lightning Systems, Inc              
Class of Warrant or Right [Line Items]              
Fractional shares exercised (in dollars per share) | shares       0      
Lightning Systems, Inc | Series C redeemable convertible preferred stock              
Class of Warrant or Right [Line Items]              
Warrant to purchase shares (in shares) | shares           4,445,783 702,811
Warrant exercise price (in dollars per share)           $ 1.42 $ 1.66
Lightning Systems, Inc | Outstanding warrants              
Class of Warrant or Right [Line Items]              
Number of warrant holders exercised the right to purchase shares | item   1 1        
Warrant to purchase shares (in shares) | shares 125,000            
Warrant exercise price (in dollars per share) $ 6.18 $ 1.66 $ 1.66   $ 1.66    
Proceeds from exercise of common warrants | $   $ 1,600 $ 1,500        
Fair value per warrant (in dollars per share) $ 3.46            
Decrease in warrant liability | $   $ 5,658 $ 5,310        
Number of vendors to whom the warrants issued | item 3            
Contractual life of warrants 5 years            
Issuance of common stock warrants | $ $ 433            
Lightning Systems, Inc | Outstanding warrants | Measurement Input, Share Price              
Class of Warrant or Right [Line Items]              
Warrants, measurement input 6.18            
Lightning Systems, Inc | Outstanding warrants | Measurement Input, Exercise Price              
Class of Warrant or Right [Line Items]              
Warrants, measurement input 6.18            
Lightning Systems, Inc | Outstanding warrants | Measurement Input, Expected Term              
Class of Warrant or Right [Line Items]              
Warrants, measurement input | Y 5            
Lightning Systems, Inc | Outstanding warrants | Measurement Input, Risk Free Interest Rate              
Class of Warrant or Right [Line Items]              
Warrants, measurement input 0.0062            
Lightning Systems, Inc | Outstanding warrants | Measurement Input, Price Volatility              
Class of Warrant or Right [Line Items]              
Warrants, measurement input 0.68            
Lightning Systems, Inc | Outstanding warrants | Minimum              
Class of Warrant or Right [Line Items]              
Fair value per warrant (in dollars per share)   $ 5.87 $ 5.87        
Lightning Systems, Inc | Outstanding warrants | Maximum              
Class of Warrant or Right [Line Items]              
Fair value per warrant (in dollars per share)   $ 5.90 $ 5.90        
Lightning Systems, Inc | Outstanding warrants | Series C redeemable convertible preferred stock              
Class of Warrant or Right [Line Items]              
Warrant to purchase shares (in shares) | shares   963,855 903,614   963,855