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FAIR VALUE MEASUREMENTS (Details 4) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Liabilities
Derivatives		$ 16
Recurring basis
Assets
Total	$ 149,375	167,919
Liabilities
Derivatives		16
Recurring basis | Money market funds
Assets
Total	13,190	40,342
Recurring basis | Government-sponsored enterprise securities
Assets
Total	6,922	6,949
Recurring basis | Commercial paper
Assets
Total	22,250	10,999
Recurring basis | Corporate notes
Assets
Total	107,013	109,629
Recurring basis | Level 1
Assets
Total	13,190	40,342
Recurring basis | Level 1 | Money market funds
Assets
Total	13,190	40,342
Recurring basis | Level 2
Assets
Total	136,185	127,577
Recurring basis | Level 2 | Government-sponsored enterprise securities
Assets
Total	6,922	6,949
Recurring basis | Level 2 | Commercial paper
Assets
Total	22,250	10,999
Recurring basis | Level 2 | Corporate notes
Assets
Total	$ 107,013	109,629
Recurring basis | Level 3
Liabilities
Derivatives		$ 16

X

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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 820



-SubTopic 10



-Section 50



-Paragraph 2



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