Nature of Business and Basis of Presentation - Additional Information (Detail) $ in Thousands |
3 Months Ended | 8 Months Ended | 12 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Aug. 01, 2017 |
Jan. 05, 2015
shares
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Dec. 31, 2017
USD ($)
|
Sep. 30, 2017
USD ($)
|
Jun. 30, 2017
USD ($)
|
Mar. 31, 2017
USD ($)
|
Dec. 31, 2016
USD ($)
|
Sep. 30, 2016
USD ($)
|
Jun. 30, 2016
USD ($)
|
Mar. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2017
USD ($)
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
|
| Nature Of Business And Basis Of Presentation [Line Items] | ||||||||||||||
| Accumulated deficit | $ (12,694) | $ (2,062) | $ (12,694) | $ (2,062) | ||||||||||
| Net loss | (3,740) | $ (6,469) | $ (169) | $ (205) | (486) | $ (268) | $ (238) | $ (242) | $ (828) | (10,583) | (1,234) | $ (828) | ||
| Cash and cash equivalents at carrying value | 5,284 | $ 15 | 5,284 | $ 15 | ||||||||||
| Working capital | $ 3,700 | $ 3,700 | ||||||||||||
| OncoGenex Pharmaceuticals, Inc [Member] | ||||||||||||||
| Nature Of Business And Basis Of Presentation [Line Items] | ||||||||||||||
| Reverse stock split ratio | 0.0909 | 0.0909 | ||||||||||||
| Conversion of each issued share of Achieve common stock , shares converted | shares | 8,210,118 | |||||||||||||
| X | ||||||||||
- Definition Conversion of shares common stock upon merger agreement. No definition available.
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| X | ||||||||||
- Definition Nature of business and basis of presentation. No definition available.
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- Definition The capital of a business which is used in its day-to-day trading operations, calculated as the current assets minus the current liabilities. No definition available.
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| X | ||||||||||
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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