FAIR VALUE MEASUREMENTS (Tables)

3 Months Ended

Mar. 31, 2016

Schedule of fair value on a recurring basis

The following table presents the Company’s assets and liabilities, measured and recognized at fair value on a recurring basis, classified under the appropriate level of the fair value hierarchy as of March 31, 2016 (in thousands):



	As of March 31, 2016
	Total carrying and estimated fair value		Quoted prices in active markets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Asset:
Marketable securities, available-for-sale	$	199,083	$	—	$	199,083	$	—

Liabilities:
Derivative liability related to warrants	$	24,470	$	—	$	—	$	24,470
Business combination-related contingent consideration	$	60,299	$	—	$	—	$	60,299

The following table presents the Company’s asset and liabilities, measured and recognized at fair value on a recurring basis, classified under the appropriate level of the fair value hierarchy as of December 31, 2015 (in thousands):



	As of December 31, 2015
	Total carrying and estimated fair value		Quoted prices in active markets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Asset:
Marketable securities, available-for-sale	$	191,799	$	—	$	191,799	$	—

Liabilities:
Derivative liability related to warrants	$	38,810	$	—	$	—	$	38,810
Business combination-related contingent consideration	$	59,021	$	—	$	—	$	59,021

Schedule of estimated fair value of the derivative financial instruments,warrants liability

The following table sets forth a summary of changes in the estimated fair value of the Company’s derivative financial instruments-warrants liability for the three months ended March 31, 2016 (in thousands):



	Fair Value Measurements of Common Stock Warrants Using Significant Unobservable Inputs (Level 3)
Balance at January 1, 2016	$	38,810
Reclassification of derivative liability to equity upon exercise of warrants	—
Issuance of Warrants	—
Change in estimated fair value of liability classified warrants	(14,340		)
Balance at March 31, 2016	$	24,470

Schedule of summary of changes in estimated acquisition related contingent consideration

The following table sets forth a summary of changes in the estimated fair value of the Company's business combination-related contingent consideration for the three months ended March 31, 2016 (in thousands):



	Fair Value Measurements of Acquisition-Related Contingent Consideration (Level 3)
Balance at January 1, 2016	$	59,021
Increase from revaluation of contingent consideration	2,695
Contractual payments accrued at March 31, 2016	(1,510		)
Foreign currency impact	93
Balance at March 31, 2016	$	60,299