DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Fair Value of Derivative Instruments and Classification on the Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Derivatives Asset	$ 75	$ 0
Derivative Liabilities	0	(70)
Sell AUD/Buy USD Fwd Contract
Derivative [Line Items]
Derivatives Asset	2	0
Derivative Liabilities	0	(9)
Sell CAD/Buy USD Fwd Contract
Derivative [Line Items]
Derivatives Asset	73	0
Derivative Liabilities	$ 0	$ (61)

Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as an asset.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624163-113959

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- Definition

Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as a liability.

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- Definition

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