COMMITMENTS AND CONTINGENCIES (Tables)

12 Months Ended

Dec. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Changes to Accrued Cease-Use Liability

The following table sets forth changes to the accrued cease-use liability during 2015 and 2014 (in thousands):

	Years Ended December 31,
	2015			2014
Beginning balance	$	2,678		$	3,096
Change in estimate		(85	)		—
Payments		(610	)		(418	)
Ending balance	$	1,983		$	2,678

Estimated Future Annual Minimum Lease Payments

As of December 31, 2015, the total estimated future annual minimum lease payments under the Company’s non-cancelable building lease for the years ending after December 31, 2015 were as follows (in thousands):

	Payment Amount
2016	$	7,606
2017		7,834
2018		8,070
2019		8,311
2020 and thereafter		—
Total future minimum lease payments	$	31,821