Annual report pursuant to Section 13 and 15(d)

STATEMENTS OF STOCKHOLDERS' EQUITY

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STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Preferred Stock [Member]
Common Stock [Member]
Additional Paid-In Capital [Member]
Accumulated Deficit [Member]
Total
Balance at Dec. 31, 2017 $ 0 $ 4 $ 324,124 $ (323,271) $ 857
Balance (in shares) at Dec. 31, 2017 0 3,534      
Net loss $ 0 $ 0 0 (9,023) (9,023)
Issuance of warrants to purchase common stock, net 0 0 527 0 527
Issuance of common stock, net 0 $ 2 2,435 0 2,437
Issuance of common stock, net (in shares)   1,815      
Issuance of preferred stock, net $ 0 $ 0 7,214 0 7,214
Issuance of preferred stock, net (in shares) 8        
Issuance of common stock upon conversion of preferred stock, net $ 0 $ 5 (11) 0 (6)
Issuance of common stock upon conversion of preferred stock, net (in shares) (8) 5,483      
Issuance of common stock upon exercise of warrants, net $ 0 $ 2 3,266 0 3,268
Issuance of common stock upon exercise of warrants, net (in shares) 0 2,178      
Stock-based compensation $ 0 $ 0 1,557 0 1,557
Deemed dividend resulting from down round provision 0 0 285 (285) 0
Balance at Dec. 31, 2018 $ 0 $ 13 339,397 (332,579) 6,831
Balance (in shares) at Dec. 31, 2018 0 13,010      
Net loss $ 0 $ 0 0 (16,458) (16,458)
Issuance of common stock upon conversion of convertible dept $ 0 $ 1 649 0 650
Issuance of common stock upon conversion of convertible dept, (in shares) 0 448      
Issuance of common stock, net $ 0 $ 37 8,200 0 8,237
Issuance of common stock, net (in shares) 0 37,696      
Issuance of common stock upon exercise of warrants, net $ 0 $ 6 1,595 0 1,601
Issuance of common stock upon exercise of warrants, net (in shares) 0 6,225      
Stock-based compensation $ 0 $ 0 572 0 572
Balance at Dec. 31, 2019 $ 0 $ 57 $ 350,413 $ (349,037) $ 1,433
Balance (in shares) at Dec. 31, 2019 0 57,379