Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

v3.21.2
Subsequent Events (Details) - USD ($)
 1 Months Ended 9 Months Ended
Oct. 22, 2021
Oct. 18, 2021
Sep. 10, 2021
Nov. 12, 2021
Sep. 30, 2021
Sep. 30, 2020
Feb. 28, 2021
Dec. 31, 2020
Jul. 15, 2020
Subsequent Event [Line Items]                  
Original issue discount         $ 0     $ 1,029,000  
Other issuance costs         0     $ 650,000  
Proceeds from sales of common stock, net of issuance costs         32,610,000 $ 1,341,000      
Lyte Technology, Inc.                  
Subsequent Event [Line Items]                  
Initial purchase price     $ 10,317,000            
Warrants | Common Stock                  
Subsequent Event [Line Items]                  
Exercise price per share (in dollars per share)             $ 2.25   $ 4.00
Subsequent Event                  
Subsequent Event [Line Items]                  
Proceeds from sales of common stock, net of issuance costs       $ 66,696,000          
Subsequent Event | Lyte Technology, Inc.                  
Subsequent Event [Line Items]                  
Initial purchase price   $ 10,980,000              
Earnout payments   2,500,000              
Subsequent Event | Warrants                  
Subsequent Event [Line Items]                  
Proceeds from warrant exercises $ 4,635,000                
Proceeds from sales of common stock, net of issuance costs       $ 4,635,000          
Subsequent Event | Warrants | Common Stock                  
Subsequent Event [Line Items]                  
Conversion of stock, shares issued (in shares) 2,060,000                
Exercise price per share (in dollars per share) $ 2.25                
Subsequent Event | Unsecured Promissory Note | Note payable                  
Subsequent Event [Line Items]                  
Principal amount of note   5,220,000              
Original issue discount   200,000              
Other issuance costs   280,000              
Proceeds from issuance of debt   4,740,000              
Monthly amortization payments   $ 574,000              
Prepayment premium (as a percent)   110.00%              
At Market Issuance Sales Agreement                  
Subsequent Event [Line Items]                  
Proceeds from sales of common stock, net of issuance costs         3,052,000        
Payments of stock offering costs         $ 97,000        
At Market Issuance Sales Agreement | Common Stock                  
Subsequent Event [Line Items]                  
Sales of common stock, net of issuance costs (in shares)         2,730,654        
At Market Issuance Sales Agreement | Subsequent Event                  
Subsequent Event [Line Items]                  
Sales of common stock, net of issuance costs (in shares)       18,220,369          
Proceeds from sales of common stock, net of issuance costs       $ 62,061,000          
Payments of stock offering costs       $ 1,919,000