Quarterly report pursuant to Section 13 or 15(d)

Equity Offerings - Additional Information (Details)

v3.22.1
Equity Offerings - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
Feb. 10, 2022
Feb. 08, 2022
Mar. 31, 2022
Feb. 28, 2022
Mar. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Class Of Stock [Line Items]              
Warrants issued price per share     $ 0.625   $ 0.625    
Warrants expire period         5 years    
Valuation of warrants   $ 0.3          
Common stock reserve for issuance     56,329,950   56,329,950    
Common stock, weighted average exercise price           $ 0.89 $ 0.89
Percentage of cash compensation for gross proceeds raised         7.50%    
Percentage of number of common shares sold to issue warrants         7.00%    
Number of warrants to issue for purchase of common stock     1,700,000   1,700,000    
Percentage of warrants exercise price in the offering         125.00%    
Expected Volatility   109.90%          
Risk-free interest rate   1.47%          
Expected dividend yield   0.00%          
Expected term (In Years)   2 years 6 months          
Accrued Expenses              
Class Of Stock [Line Items]              
Cash fee for placement agent         $ 0.9    
Offering              
Class Of Stock [Line Items]              
Common stock issued (in shares)   9,535,000          
Stock issued during period, warrants exercised     50,000        
Proceeds from issuance of common stock         $ 9.7    
Offering | Series A Warrants              
Class Of Stock [Line Items]              
Common stock issued (in shares)   24,002,893          
Equity offering description   warrants to purchase one share of common stock          
Warrants issued price per share   $ 0.50          
Warrants expire period   1 year          
Stock issued during period, warrants exercised     25,000        
Offering | Series B Warrants              
Class Of Stock [Line Items]              
Common stock issued (in shares)   24,002,893          
Equity offering description   warrants to purchase one share of common stock          
Warrants issued price per share   $ 0.50          
Warrants expire period   7 years          
Stock issued during period, warrants exercised     25,000        
Offering | Pre-Funded Warrants              
Class Of Stock [Line Items]              
Common stock issued (in shares)   14,467,893          
Equity offering description   warrants to purchase one share of common stock          
Warrants issued price per share   $ 0.0001          
Warrants expire period   20 years          
Stock issued during period, warrants exercised     14,467,893 14,467,893      
Offering | Series A Warrants and Series B Warrants              
Class Of Stock [Line Items]              
Valuation of warrants   $ 7.0          
Overallotment Option              
Class Of Stock [Line Items]              
Common stock issued (in shares) 1,245,116            
Overallotment option period   45 days          
Cash proceeds $ 0.5            
Overallotment Option | Maximum              
Class Of Stock [Line Items]              
Common stock issued (in shares)   3,600,000          
Overallotment Option | Series A Warrants | Maximum              
Class Of Stock [Line Items]              
Common stock issued (in shares)   3,600,000          
Overallotment Option | Series B Warrants | Maximum              
Class Of Stock [Line Items]              
Common stock issued (in shares)   3,600,000