Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (unaudited)

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CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (unaudited) - USD ($)
$ in Thousands
Series B Convertible Preferred Stock [Member]
Common Stock [Member]
Additional Paid in Capital [Member]
Accumulated Other Comprehensive Gain (loss) [Member]
Accumulated Deficit [Member]
Total
Balance, at beginning at Dec. 31, 2019   $ 9 $ 226,524 $ (46) $ (217,070) $ 9,417
Balance, at beginning (in shares) at Dec. 31, 2019   8,531,504        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Issuance of common stock in exchange for exercise of warrants in February and March 2020 ($0.57 per share)   $ 13 7,461     7,474
Issuance of common stock in exchange for exercise of warrants in February and March 2020 ($0.57 per share) (in shares)   13,111,999        
Deemed dividend in connection with repricing of November 2019 warrants     451     451
Warrant deemed dividend     (451)     (451)
Issuance of Series B Convertible preferred stock and common stock warrants in February 2020 ($1,000.00 per share, net of transactional expenses of $711)     4,602     4,602
Issuance of Series B Convertible preferred stock and common stock warrants in February 2020 ($1,000.00 per share, net of transactional expenses of $711) (in shares) 5,313          
Beneficial conversion feature in connection with issuance of Series B Convertible preferred stock     1,260     1,260
Preferred stock deemed dividend     (1,260)     (1,260)
Issuance of common stock and common stock warrants in February 2020 ($0.57 per share, net of transactional expenses of $292)   $ 4 1,891     1,895
Issuance of common stock and common stock warrants in February 2020 ($0.57 per share, net of transactional expenses of $292) (in shares)   3,837,000        
Issuance of common stock upon conversion of Series B Convertible preferred stock   $ 9 (9)      
Issuance of common stock upon conversion of Series B Convertible preferred stock (in shares) (5,313) 9,321,053        
Issuance of common stock in March 2020 ($1.10 per share, net of transactional expenses of $1,221)   $ 14 14,770     14,784
Issuance of common stock in March 2020 ($1.10 per share, net of transactional expenses of $1,221) (in shares)   14,550,000        
Employee stock purchase plan     2     2
Employee stock purchase plan (in shares)   1,578        
Stock-based compensation     360     360
Foreign currency transaction gain       (14)   (14)
Net loss         (7,273) (7,273)
Balance, at end at Mar. 31, 2020   $ 49 255,601 (60) (224,343) 31,247
Balance, at end (in shares) at Mar. 31, 2020   49,353,134        
Balance, at beginning at Dec. 31, 2020   $ 206 355,037 (62) (267,533) 87,648
Balance, at beginning (in shares) at Dec. 31, 2020   206,008,683        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Issuance of common stock upon exercise of warrants in March 2021 ($0.57 per share)     2     2
Issuance of common stock upon exercise of warrants in March 2021 ($0.57 per share) (in shares)   3,400        
Issuance of common stock in January 2021 ($0.80 per share), net of transactional expenses of $3,096   $ 50 36,854     36,904
Issuance of common stock in January 2021 ($0.80 per share), net of transactional expenses of $3,096 (in shares)   50,000,000        
Issuance of common stock in February 2021 ($1.20 per share), net of transactional expenses of $5,002   $ 58 64,939     64,997
Issuance of common stock in February 2021 ($1.20 per share), net of transactional expenses of $5,002 (in shares)   58,333,334        
Issuance of common stock under at-the-market offering, net of transactional expenses of $230   $ 10 6,769     6,779
Issuance of common stock under at-the-market offering, net of transactional expenses of $230 (in shares)   9,517,867        
Employee stock purchase plan     28     28
Employee stock purchase plan (in shares)   54,447        
Stock-based compensation     1,212     1,212
Foreign currency transaction gain       (1)   (1)
Net loss         (20,653) (20,653)
Balance, at end at Mar. 31, 2021   $ 324 $ 464,841 $ (63) $ (288,186) $ 176,916
Balance, at end (in shares) at Mar. 31, 2021   323,917,731