Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Narrative (Details)

v3.22.1
Stockholders' Equity - Narrative (Details) - USD ($)
 1 Months Ended 12 Months Ended
Apr. 07, 2021
Feb. 28, 2021
Jan. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2018
Dec. 31, 2012
Aug. 14, 2020
Jul. 15, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                  
Common stock, shares authorized (in shares)       1,000,000,000 1,000,000,000        
Common stock, par value (in dollars per share)       $ 0.0001 $ 0.0001        
Common stock, shares issued (in shares)       96,751,610 56,371,207        
Common stock, shares outstanding (in shares)       96,751,610 56,371,207        
Proceeds from sales of common stock, net of issuance costs       $ 94,737,000 $ 9,177,000        
Proceeds from warrant exercises       $ 4,635,000 $ 0        
Number of warrants (in shares)       5,636,801 5,996,112        
Warrants                  
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                  
Proceeds from warrant exercises       $ 4,635,000          
Exercise price per share (in dollars per share)           $ 9.22 $ 5.54    
Warrant to purchase aggregate shares of common stock (in shares)           1,085,059 14,866    
Number of warrants (in shares)   3,840,000             2,160,000
Number of times the exercise price (as a percent)             300.00%    
Warrants | Common Stock                  
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                  
Conversion of stock, shares issued (in shares)       2,060,000          
Exercise price per share (in dollars per share)   $ 2.25   $ 2.25         $ 4.00
Underwritten Offering                  
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                  
Proceeds from sales of common stock, net of issuance costs   $ 24,722,000              
Payments of stock offering costs   1,740,000              
Additional transaction costs   $ 75,000              
Underwritten Offering | Common Stock                  
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                  
Sale of common stock, net of issuance costs (in shares)   11,761,111              
Common stock exercise price (in dollars per share)   $ 2.25              
At Market Issuance Sales Agreement                  
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                  
Payments of stock offering costs       $ 2,017,000          
Additional transaction costs       178,000          
Gross proceeds of sales price per share (as a percent) 3.00%                
Aggregate net proceeds received       $ 65,210,000          
Public Warrants | Warrants                  
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                  
Exercise price per share (in dollars per share)       $ 0.01          
Last sale price of shares of common stock (exceeds, in dollars per share)       $ 21.00          
Number of days within 30-trading day period       20 days          
Trading day period       30 days          
Private Placement | Warrants                  
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                  
Exercise price per share (in dollars per share)       $ 11.50          
Minimum number of days written notice to redeem Public Warrants       30 days          
Sales Agreement                  
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                  
Aggregate offering price               $ 15,000,000  
At-The-Market Offering                  
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                  
Proceeds from sales of common stock, net of issuance costs     $ 5,058,000            
Payments of stock offering costs     $ 156,000            
At-The-Market Offering | Common Stock                  
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                  
Sale of common stock, net of issuance costs (in shares)     2,670,121            
Common Stock                  
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                  
Sale of common stock, net of issuance costs (in shares)       35,383,000 11,629,160        
Proceeds from sales of common stock, net of issuance costs         $ 9,578,000        
Payments of stock offering costs       $ 401,000          
Common Stock | At Market Issuance Sales Agreement                  
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                  
Sale of common stock, net of issuance costs (in shares)       20,951,043          
PhunCoin Warrant                  
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                  
Exercise price per share (in dollars per share)       $ 11.50