Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Warrant Activity (Details)

v3.21.1
Stockholders' Equity - Warrant Activity (Details) - $ / shares
Dec. 31, 2020
Dec. 31, 2019
Class of Warrant or Right [Line Items]    
Warrants Outstanding, December 31, 2020 5,996,112 3,836,112
Warrants Outstanding, December 31, 2019 5,996,112 3,836,112
2020 Convertible Note warrants    
Class of Warrant or Right [Line Items]    
Cash exercise price per share (in dollars per share) $ 4.00  
Warrants Outstanding, December 31, 2020 2,160,000 0
Warrants Outstanding, December 31, 2019 2,160,000 0
Common stock warrant (Series D-1)    
Class of Warrant or Right [Line Items]    
Cash exercise price per share (in dollars per share) $ 5.54  
Warrants Outstanding, December 31, 2020 14,866 14,866
Warrants Outstanding, December 31, 2019 14,866 14,866
Common stock warrants (Series F)    
Class of Warrant or Right [Line Items]    
Cash exercise price per share (in dollars per share) $ 9.22  
Warrants Outstanding, December 31, 2020 377,402 377,402
Warrants Outstanding, December 31, 2019 377,402 377,402
Public Warrants (PHUNW)    
Class of Warrant or Right [Line Items]    
Cash exercise price per share (in dollars per share) $ 11.50  
Warrants Outstanding, December 31, 2020 1,761,291 1,761,291
Warrants Outstanding, December 31, 2019 1,761,291 1,761,291
Private Placement Warrants    
Class of Warrant or Right [Line Items]    
Cash exercise price per share (in dollars per share) $ 11.50  
Warrants Outstanding, December 31, 2020 1,658,381 1,658,381
Warrants Outstanding, December 31, 2019 1,658,381 1,658,381
Unit Purchase Option Warrants    
Class of Warrant or Right [Line Items]    
Cash exercise price per share (in dollars per share) $ 11.50  
Warrants Outstanding, December 31, 2020 24,172 24,172
Warrants Outstanding, December 31, 2019 24,172 24,172