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Consolidated Statements of Stockholder's Equity - USD ($) $ in Thousands | Total | Extab [Member] | LPC [Member] | Common Stock | Common Stock Extab [Member] | Common Stock LPC [Member] | Additional paid-in capital [Member] | Additional paid-in capital [Member] Extab [Member] | Additional paid-in capital [Member] LPC [Member] | Accumulated other comprehensive income (loss) [Member] | Accumulated deficit [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance at May. 12, 2015 | $ 0 |  |  | $ 0 |  |  | $ 0 |  |  | $ 0 | $ 0
Beginning Balance, Shares at May. 12, 2015 |  |  |  | 0 |  |  |  |  |  |  |
Common stock issued, Shares |  |  |  | 11,730 |  |  |  |  |  |  |
Conversion of common stock held by Extab Corporation stockholders into common stock [note 6] |  | $ 667 |  |  |  |  |  | $ 667 |  |  |
Conversion of common stock held by Extab Corporation stockholders into common stock [note 6], Shares |  |  |  |  | 5,000 |  |  |  |  |  |
Conversion of note payable into common stock [note 6] | 2,000 |  |  |  |  |  | 2,000 |  |  |  |
Conversion of note payable into common stock [note 6], Shares |  |  |  | 4,500 |  |  |  |  |  |  |
Net loss | (828) |  |  |  |  |  |  |  |  |  | (828)
Other comprehensive income (loss) | 1 |  |  |  |  |  |  |  |  | 1 |
Ending Balance at Dec. 31, 2015 | $ 1,840 |  |  |  |  |  | 2,667 |  |  | 1 | (828)
Ending Balance, Shares at Dec. 31, 2015 |  |  |  | 21,230 |  |  |  |  |  |  |
Restricted Stock Unit Settlements, Shares | 0 |  |  |  |  |  |  |  |  |  |
Net loss | $ (1,234) |  |  |  |  |  |  |  |  |  | (1,234)
Other comprehensive income (loss) | 4 |  |  |  |  |  |  |  |  | 4 |
Ending Balance at Dec. 31, 2016 | 610 |  |  |  |  |  | 2,667 |  |  | 5 | (2,062)
Ending Balance, Shares at Dec. 31, 2016 |  |  |  | 21,230 |  |  |  |  |  |  |
Common stock issued |  |  | $ 2,306 |  |  | $ 1 |  |  | $ 2,305 |  |
Common stock issued, Shares |  |  |  |  |  | 997,301 |  |  |  |  |
Stock-based compensation expense | 348 |  |  |  |  |  | 348 |  |  |  |
Settlement of stockholder loans with related parties | 2,132 |  |  |  |  |  | 2,132 |  |  |  |
Settlement of stockholder loans with related parties, Shares |  |  |  | 1,572 |  |  |  |  |  |  |
Shares issued on subscription | 64 |  |  |  |  |  | 64 |  |  |  |
Shares issued on subscription, Shares |  |  |  | 48 |  |  |  |  |  |  |
Shares held by OncoGenex Shareholders | 3 |  |  | $ 3 |  |  |  |  |  |  |
Shares held by OncoGenex Shareholders, Shares |  |  |  | 2,736,709 |  |  |  |  |  |  |
Shares issued on conversion of Achieve common shares | $ 13,048 |  |  | $ 8 |  |  | 13,040 |  |  |  |
Shares issued on conversion of Achieve common shares, Shares |  |  |  | 8,210,118 |  |  |  |  |  |  |
Shares cancelled on conversion of Achieve common shares |  |  |  | (22,850) |  |  |  |  |  |  |
Restricted Stock Unit Settlements, Shares | 5,464 |  |  | 5,464 |  |  |  |  |  |  |
Restricted Stock Unit Settlements withheld and retired to treasury | $ (5) |  |  |  |  |  |  |  |  |  | (5)
Restricted Stock Unit Settlements withheld and retired to treasury, Shares |  |  |  | (1,660) |  |  |  |  |  |  |
Purchase accounting adjustment | (44) |  |  |  |  |  |  |  |  |  | (44)
Net loss | (10,583) |  |  |  |  |  |  |  |  |  | (10,583)
Ending Balance at Dec. 31, 2017 | $ 7,879 |  |  | $ 12 |  |  | $ 20,556 |  |  | $ 5 | $ (12,694)
Ending Balance, Shares at Dec. 31, 2017 |  |  |  | 11,947,932 |  |  |  |  |  |  |

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