Achieve Life Sciences, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details 2)

Fair Value Measurements (Details 2) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Cash [Member]
Summary of marketable securities
Amortized Cost	$ 2,612
Gross Unrealized Gains
Gross Unrealized Losses
Estimated Fair Value	2,612
Money market securities [Member]
Summary of marketable securities
Amortized Cost	16,016
Gross Unrealized Gains
Gross Unrealized Losses
Estimated Fair Value	16,016
Total cash and cash equivalents [Member]
Summary of marketable securities
Amortized Cost	18,628
Gross Unrealized Gains
Gross Unrealized Losses
Estimated Fair Value	18,628
Money market securities [Member]
Summary of marketable securities
Amortized Cost	314
Gross Unrealized Gains
Gross Unrealized Losses
Estimated Fair Value	314
Total restricted cash [Member]
Summary of marketable securities
Amortized Cost	314
Gross Unrealized Gains
Gross Unrealized Losses
Estimated Fair Value	314
Corporate bonds and commercial paper [Member]
Summary of marketable securities
Amortized Cost	45,971
Gross Unrealized Gains	1
Gross Unrealized Losses	(11)
Estimated Fair Value	45,961
Total short-term investments [Member]
Summary of marketable securities
Amortized Cost	45,971
Gross Unrealized Gains	1
Gross Unrealized Losses	(11)
Estimated Fair Value	$ 45,961

- Definition

Amount of debt securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

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Reference 8: http://www.xbrl.org/2003/role/presentationRef

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-Name Statement of Financial Accounting Standard (FAS)

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Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details