INCOME TAXES - ADDITIONAL INFORMATION (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Benefit (provision) for income taxes	$ 44	$ 3,760	$ 295	$ (1,264)
Prepaid income taxes	0		0		$ (4,997)
Retained earnings (accumulated deficit)	(159,322)		(159,322)		(119,329)
Unrecognized tax benefits	6,300		6,300
Unrecognized tax benefits, interest	8		8
Unrecognized tax benefits that would affect the Company's effective tax rate	97		97
Deferred income tax assets	437		437
Deferred income tax liabilities	36		36
Valuation allowance of deferred tax assets	$ 42,300		$ 42,300
New Accounting Pronouncement, Early Adoption, Effect [Member] | Accounting Standards Update 2016-16 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Prepaid income taxes					7,000
Retained earnings (accumulated deficit)					$ (7,000)