FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Level 2
Fair value measurements
Long-term debt, fair value	$ 118,900	$ 32,900
Marketable securities, fair value	2,000
Recurring basis \| Total
Fair value measurements
Total assets measured at fair value	23,634	76,640
Recurring basis \| Certificate of deposit \| Total
Fair value measurements
Certificates of deposit	388	377
Recurring basis \| Money market funds \| Total
Fair value measurements
Investments, Fair Value Disclosure	15,824	76,263
Recurring basis \| Short Term Investments \| Total
Fair value measurements
Investments, Fair Value Disclosure	7,422
Recurring basis \| Level 1
Fair value measurements
Total assets measured at fair value	15,824	76,263
Recurring basis \| Level 1 \| Money market funds
Fair value measurements
Investments, Fair Value Disclosure	15,824	76,263
Recurring basis \| Level 2
Fair value measurements
Total assets measured at fair value	7,810	377
Recurring basis \| Level 2 \| Certificate of deposit
Fair value measurements
Certificates of deposit	388	$ 377
Recurring basis \| Level 2 \| Short Term Investments
Fair value measurements
Investments, Fair Value Disclosure	$ 7,422

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
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Fair value portion 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash
-URI http://asc.fasb.org/extlink&oid=6506951

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No definition available.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Total debt and equity financial instruments including: (1) securities held-to-maturity, (2) trading securities, and (3) securities available-for-sale.

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