Achieve Life Sciences, Inc. Annual report pursuant to Section 13 and 15(d)

Property and Equipment - Summary of Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Cost	$ 1,211	$ 975
Accumulated Depreciation	814	604
Net Book Value	397	371
Computer equipment [Member]
Property, Plant and Equipment [Line Items]
Cost	873	489
Accumulated Depreciation	538	366
Net Book Value	335	123
Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Cost	170	154
Accumulated Depreciation	139	125
Net Book Value	31	29
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Cost	54	55
Accumulated Depreciation	53	49
Net Book Value	1	6
Equipment under capital lease [Member]
Property, Plant and Equipment [Line Items]
Cost	114	106
Accumulated Depreciation	84	64
Net Book Value	30	42
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Cost		171
Accumulated Depreciation
Net Book Value		$ 171