Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Warrants at $3.00 Per Share [Member]
Common Stock [Member]
Warrants at $3.00 Per Share [Member]
Additional Paid-in Capital [Member]
Warrants at $3.00 Per Share [Member]
Warrants at $5.00 Per Share [Member]
Common Stock [Member]
Warrants at $5.00 Per Share [Member]
Additional Paid-in Capital [Member]
Warrants at $5.00 Per Share [Member]
Warrants at $6.00 Per Share [Member]
Common Stock [Member]
Warrants at $6.00 Per Share [Member]
Additional Paid-in Capital [Member]
Warrants at $6.00 Per Share [Member]
Warrants at $6.50 Per Share [Member]
Common Stock [Member]
Warrants at $6.50 Per Share [Member]
Additional Paid-in Capital [Member]
Warrants at $6.50 Per Share [Member]
Warrants at $8.125 Per Share [Member]
Common Stock [Member]
Warrants at $8.125 Per Share [Member]
Additional Paid-in Capital [Member]
Warrants at $8.125 Per Share [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
AOCI Attributable to Parent [Member]
Total
Balance (in shares) at Dec. 31, 2019                               29,829,916        
Balance at Dec. 31, 2019                               $ 3 $ 31,923 $ (12,730)   $ 19,196
Sale of Common Stock and warrant in public offering, net of issuance costs (in shares)                               2,066,667        
Sale of Common Stock and warrant in public offering, net of issuance costs                                 11,667     $ 11,667
Common shares issued upon exercise of warrants, net of issuance costs (in shares) 328,458     3,890,839     675,000     261,679                    
Common shares issued upon exercise of warrants, net of issuance costs   $ 961 $ 961 $ 1 $ 18,718 $ 18,719   $ 3,848 $ 3,848   $ 1,646 $ 1,646                
Common shares issued upon exercise of stock options (in shares)                               371,000       371,000
Common shares issued upon exercise of stock options                                 705     $ 705
Common shares issued upon vesting of restricted stock units (in shares)                               130,603        
Share-based compensation expense                                 2,237     2,237
Net unrealized gain on short-term investments                                     $ 15 15
Net loss for the period                                   (12,580)   (12,580)
Net loss                                   (12,580)   (12,580)
Balance (in shares) at Dec. 31, 2020                               37,554,162        
Balance at Dec. 31, 2020                               $ 4 71,705 (25,310) 15 $ 46,414
Common shares issued upon exercise of stock options (in shares)                               915,404       915,404
Common shares issued upon exercise of stock options                                 1,678     $ 1,678
Common shares issued upon vesting of restricted stock units (in shares)                               524,491        
Share-based compensation expense                                 5,356     5,356
Net unrealized gain on short-term investments                                       (21)
Net loss for the period                                   (24,449)   (24,449)
Common shares issued upon exercise of warrants (in shares)                   1,661,320     153,692              
Common shares issued upon exercise of warrants                     $ 10,798 $ 10,798   $ 1,249 $ 1,249          
Common shares issued for services (in shares)                               42,876        
Common shares issued for services                                 239     239
Net unrealized loss on short-term investments                                     (21) (21)
Net loss                                   (24,449)   (24,449)
Balance (in shares) at Dec. 31, 2021                               40,851,945        
Balance at Dec. 31, 2021                               $ 4 $ 91,025 $ (49,759) $ (6) $ 41,264