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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
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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 |  |  |  |  |  |  |

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