Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2018

The following table sets forth the components of the Company’s cash, cash equivalents, and restricted cash as reported in the consolidated statement of cash flows for the nine month periods ended September 30, 2018 and 2017 (in thousands):



Cash, Cash Equivalents, and Restricted Cash	Nine Months Ended September 30,
	2018		2017
Cash and cash equivalents	$	275,346	$	345,380
Restricted cash	803		2,011
Total cash, cash equivalents, and restricted cash	$	276,149	$	347,391

Restrictions on Cash and Cash Equivalents



Cash, Cash Equivalents, and Restricted Cash	Nine Months Ended September 30,
	2018		2017
Cash and cash equivalents	$	275,346	$	345,380
Restricted cash	803		2,011
Total cash, cash equivalents, and restricted cash	$	276,149	$	347,391

Basis used to measure the fair value of financial instruments

The following table summarizes the basis used to measure the fair values of the Company’s financial instruments (amounts in thousands):



			Fair Value Measurements at Reporting Date, Using:
Description	September 30, 2018		Quoted Prices in Active Markets for Identical Items (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash and cash equivalents	$	275,346	$	275,346	$	—	$	—
Nicox stock with lockup provisions	23		—		—		23
Total assets	$	275,369	$	275,346	$	—	$	23



Description	December 31, 2017		Quoted Prices in Active Markets for Identical Items (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash and cash equivalents	$	368,119	$	368,119	$	—	$	—
Nicox stock with lockup provisions	35		—		—		35
Total assets	$	368,154	$	368,119	$	—	$	35

Purchase consideration payable	$	3,901	$	—	$	—	$	3,901
Total liabilities	$	3,901	$	—	$	—	$	3,901