FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value Disclosures [Abstract]

Financial assets and liabilities measured at fair value on a recurring basis

The following table represents the Company's fair value hierarchy for its financial assets and liabilities measured at fair value on a recurring basis as of December 31, 2015 and 2014 (in thousands):

	December 31, 2015								December 31, 2014
	Fair Value Measurements Using Input Types								Fair Value Measurements Using Input Types
	Level 1		Level 2		Level 3		Total		Level 2		Level 3		Total
Assets:
Money market fund	$	30,000	$	—	$	—	$	30,000	$	—	$	—	$	—
Derivative assets	—		341		—		341		1,258		—		1,258
Non-marketable securities	—		—		2,753		2,753		—		3,384		3,384
Total assets	$	30,000	$	341	$	2,753	$	33,094	$	1,258	$	3,384	$	4,642
Liabilities:
Derivative liabilities	$	—	82		$	—	$	82	$	—	$	—	$	—

Fair value of non-marketable securities

The following table summarizes the change in the fair value of the Company's non-marketable securities during the year ended December 31, 2015 (in thousands).

Balance as of December 31, 2013	$	4,383
Sales	(3,133		)
Impairment	(139		)
Realized gain	2,548
Unrealized gain	(275		)
Balance as of December 31, 2014	$	3,384
Sales	(1,822		)
Impairment	(47		)
Realized gain	1,383
Unrealized gain	(145		)
Balance as of December 31, 2015	$	2,753