Quarterly report pursuant to Section 13 or 15(d)

Organization and Description of Business Operations (Details)

v3.23.1
Organization and Description of Business Operations (Details)
$ / shares in Units, $ in Thousands
 1 Months Ended
Jan. 01, 2023
$ / shares
shares
Nov. 03, 2022
Vote
shares
Apr. 30, 2023
USD ($)
$ / shares
shares
Feb. 28, 2023
USD ($)
$ / shares
shares
Mar. 31, 2023
USD ($)
Vote
multiplier
shares
Dec. 31, 2022
USD ($)
Organization and Description of Business Operations            
Reverse stock split, conversion ratio   0.1        
Number of votes per share | Vote         1  
Multiplier to calculate voting rights per class A common share | multiplier         1.1  
Percentage of voting power held by shareholders who signed the written consent to effect a reverse stock split   58.00%        
Period after mailing of information statement to the common stockholders of record, that the reverse stock split will become effective   20 days        
Accumulated deficit | $         $ (272,960) $ (262,486)
Net proceeds from offering | $     $ 5,500      
Payments of Commissions and Other Transaction Costs, At the Market Offering | $       $ 7,500    
Cash and cash equivalents | $         $ 4,846 $ 12,068
Pre-Funded Warrants            
Organization and Description of Business Operations            
Number of warrants issued       248,572    
Exercise price | $ / shares       $ 5.2499    
Series A warrants            
Organization and Description of Business Operations            
Number of shares issued for warrants     1,700,000      
Expiration term     5 years      
Exercise price | $ / shares     $ 3.35      
Series B warrants            
Organization and Description of Business Operations            
Number of shares issued for warrants     1,700,000      
Expiration term     18 months      
Exercise price | $ / shares     $ 3.35      
Private Placement            
Organization and Description of Business Operations            
Number of shares issued       1,428,572    
Number of shares issued for warrants       1,428,572    
April 2023 Direct Offering            
Organization and Description of Business Operations            
Number of shares issued     1,700,000      
Net proceeds from offering | $       $ 6,700    
Gross proceeds from offering | $     $ 6,100      
Purchase price per share | $ / shares     $ 3.60      
Payments of Commissions and Other Transaction Costs, At the Market Offering | $     $ 600      
At the market offering (ATM)            
Organization and Description of Business Operations            
Number of shares issued 368,907     1,180,000    
Exercise price | $ / shares       $ 5.00    
Purchase price per share | $ / shares $ 2.5     $ 5.25    
Payments of Commissions and Other Transaction Costs, At the Market Offering | $       $ 800    
Class A Common Shares            
Organization and Description of Business Operations            
Number of shares held by shareholders who signed the written consent to effect a reverse stock split   7,000,000        
Number of votes per share | Vote   13.5        
Multiplier to calculate voting rights per class A common share | Vote   1.1        
Class A Common Shares | Common Shares            
Organization and Description of Business Operations            
Number of shares held by shareholders who signed the written consent to effect a reverse stock split   10,914,552        
Number of votes per share | Vote   1        
2015 Incentive Plan            
Organization and Description of Business Operations            
Number of shares available for issuance authorized         3,000,000  
2015 Incentive Plan | Maximum            
Organization and Description of Business Operations            
Number of shares available for issuance authorized   3,000,000        
2015 Incentive Plan | Minimum            
Organization and Description of Business Operations            
Number of shares available for issuance authorized   900,000