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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) - USD ($)
$ in Thousands
Restructuring Liability [Member]
Additional Paid-in Capital [Member]
Restructuring Liability [Member]
Side Warrants [Member]
Additional Paid-in Capital [Member]
Side Warrants [Member]
Note Conversion Warrants
Additional Paid-in Capital [Member]
Note Conversion Warrants
Preferred Stock [Member]
Preferred Stock [Member]
Preferred Stock [Member]
Common Stock [Member]
Common Stock [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Preferred Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Deficit [Member]
Common Stock [Member]
Preferred Stock [Member]
Total
Balance at beginning of period at Dec. 31, 2015               $ 13   $ 4     $ 4,652 $ (6,766)     $ (2,097)
Balance at beginning of period (in shares) at Dec. 31, 2015               1,263,429   422,803              
Increase (Decrease) in Stockholders' Equity                                  
Net loss                           (2,227)     (2,227)
Preferred dividends                           (433)     (433)
Exchange of preferred stock to notes and warrants               $ (5)         (1,710)       (1,715)
Exchanged of preferred stock to notes and warrants, shares               (483,324)                  
Deemed dividends on exchange of preferred                         1,422 (1,422)      
Shares converted, value                                 (433)
Non-cash stock-based compensation and vesting of restricted units                         12       12
Non-cash stock-based compensation and vesting of restricted units (in shares)                   26,372              
Balance at end of period at Dec. 31, 2016               $ 8   $ 4     4,376 (10,848)     (6,460)
Balance at end of period (in shares) at Dec. 31, 2016               780,105   449,175              
Increase (Decrease) in Stockholders' Equity                                  
Net loss                           (20,694)     (20,694)
Conversion of warrants into stock                 $ 20   $ (20) $ 25       $ 25  
Conversion of warrants into stock (in shares)             8,542   1,958,166                
Shares converted, value               $ (25)   $ 42     (17)        
Conversion of preferred stock into common stock (in shares)               (2,527,879)   4,217,408              
Conversion of debt into stock               $ 8 $ 6 $ 14 $ 2,732   4,749   $ 2,738   4,771
Conversion of debt into stock (in shares)               802,920 515,638 1,414,700              
Issuance of common stock for consulting services in connection with the merger                   $ 3     2,186       2,189
Issuance of common stock for consulting services in connection with the merger (in shares)                   321,821              
Shares issued in connection with business combination               $ 8   $ 12     20,078       20,098
Shares issued in connection with business combination (in shares)               802,925   1,255,119              
Issuance of warrants $ 159 $ 159 $ 487 $ 487 $ 15 $ 15   $ 1         7,783       7,784
Issuance of preferred stock (in shares)               138,322                  
Issuance of warrants $ 159 $ 159 $ 487 $ 487 $ 15 $ 15   $ 1         7,783       7,784
Beneficial conversion feature on issuance of bridge notes                         1,856       1,856
Non-cash stock-based compensation and vesting of restricted units                   $ 1     56       57
Non-cash stock-based compensation and vesting of restricted units (in shares)                   64,593              
Balance at end of period at Dec. 31, 2017                   $ 102     $ 44,465 $ (31,542)     $ 13,025
Balance at end of period (in shares) at Dec. 31, 2017               4,935   10,196,620