Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Series A Convertible Preferred Stock [Member]
Common Stock [Member]
Additional Paid-In Capital [Member]
Accumulated Other Comprehensive loss [Member]
Accumulated Deficit [Member]
Total
Balance, at beginning at Dec. 31, 2017     $ 186,991 $ (12) $ (162,363) $ 24,616
Balance, at beginning (in shares) at Dec. 31, 2017   82,064        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Issuance of common stock related to restricted stock units (in shares)   8        
Issuance of commitment shares in October 2018 ($70.00 per share) (in shares)   3,500        
Issuance of common stock under 2017 Purchase Agreement, net of transactional expenses of $45     2,315     2,315
Issuance of common stock under 2017 Purchase Agreement, net of transactional expenses of $45 (in shares)   11,797        
Issuance of common stock under At-the-market offering, net of transactional expenses of $212     6,857     6,857
Issuance of common stock under At-the-market offering, net of transactional expenses of $212 (in shares)   59,349        
Issuance of Series A Convertible preferred stock and common stock warrants in December 2018 ($1,000.00 per unit, net of transactional expenses of $1,159)     10,825     10,825
Issuance of Series A Convertible preferred stock and common stock warrants in December 2018 ($1,000.00 per unit, net of transactional expenses of $1,159) (in shares) 11,984          
Issuance of common stock and common stock warrants in December 2018 ($35.00 per unit, net of transaction expenses of $353)     3,542     3,542
Issuance of common stock and common stock warrants in December 2018 ($35.00 per unit, net of transaction expenses of $353) (in shares)   111,171        
Beneficial conversion feature in connection with issuance of Series A Convertible preferred stock     3,266     3,266
Preferred stock deemed dividend     (3,266)     (3,266)
Issuance of common stock upon conversion of Series A Convertible preferred stock (in shares) (2,128) 60,800        
Stock-based compensation     1,627     1,627
Foreign currency transaction gain (loss)       (29)   (29)
Net loss         (26,089) (26,089)
Balance, at end at Dec. 31, 2018     212,157 (41) (188,452) 23,664
Balance, at end (in shares) at Dec. 31, 2018 9,856 328,689        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Issuance of common stock upon conversion of Series A Convertible preferred stock   $ 1 (1)      
Issuance of common stock upon conversion of Series A Convertible preferred stock (in shares) (9,856) 281,610        
Issuance of common stock in exchange for exercise of warrants in March 2019 ($35.00 per share)     70     70
Issuance of common stock in exchange for exercise of warrants in March 2019 ($35.00 per share) (in shares)   2,000        
Issuance of common stock under 2018 Purchase Agreement     387     387
Issuance of common stock under 2018 Purchase Agreement (in shares)   22,754        
Issuance of common stock under At-the-market offering, net of transactional expenses of $1     33     33
Issuance of common stock under At-the-market offering, net of transactional expenses of $1 (in shares)   2,106        
Issuance of common stock under 2019 Purchase Agreement, net of transactional expenses of $916   $ 1 4,483     4,484
Issuance of common stock under 2019 Purchase Agreement, net of transactional expenses of $916 (in shares)   900,000        
Issuance of commitment shares in August 2019 (in shares)   35,529        
Issuance of Series A Convertible preferred stock and common stock warrants in November 2019 ($1,000.00 per share, net of transactional expenses of $957)     6,980     6,980
Issuance of Series A Convertible preferred stock and common stock warrants in November 2019 ($1,000.00 per share, net of transactional expenses of $957) (in shares) 7,938          
Beneficial conversion feature in connection with issuance of Series A Convertible preferred stock     2,474     2,474
Preferred stock deemed dividend     (2,474)     (2,474)
Issuance of common stock and common stock warrants in November 2019 ($1.94 per share, net of transaction expenses of $128)   $ 1 933     934
Issuance of common stock and common stock warrants in November 2019 ($1.94 per share, net of transaction expenses of $128) (in shares)   547,420        
Issuance of common stock upon conversion of Series A Convertible preferred stock   $ 4 (4)      
Issuance of common stock upon conversion of Series A Convertible preferred stock (in shares) (7,938) 4,091,753        
Issuance of common stock in exchange for exercise of cashless warrants   $ 2 (2)      
Issuance of common stock in exchange for exercise of cashless warrants (in shares)   2,317,085        
Employee stock purchase plan     31     31
Employee stock purchase plan (in shares)   2,558        
Stock-based compensation     1,457     1,457
Foreign currency transaction gain (loss)       (5)   (5)
Net loss         (28,618) (28,618)
Balance, at end at Dec. 31, 2019   $ 9 $ 226,524 $ (46) $ (217,070) $ 9,417
Balance, at end (in shares) at Dec. 31, 2019   8,531,504