Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 88,535	$ 65,626
Short-term investments	60,225	47,379
Accounts receivable, net of allowance for doubtful accounts of $680 and $0, respectively	15,228	15,863
Unbilled contract receivable	13,167	51,923
Other current assets	16,887	19,150
Total current assets	194,042	199,941
Restricted cash	8,540	0
Property and equipment, net	35,901	38,855
Intangible assets, net	457,405	541,879
Goodwill	385,574	382,963
Other assets	18,234	22,798
Total assets	1,099,696	1,186,436
Current liabilities:
Accounts payable	6,273	7,531
Accrued legal fees	5,021	7,505
Accrued liabilities	39,711	29,086
Current portion of long-term debt	6,000	6,000
Deferred revenue	4,578	895
Total current liabilities	61,583	51,017
Long-term deferred tax liabilities	9,589	32,565
Long-term debt, net	574,557	577,239
Other long-term liabilities	17,792	17,830
Commitments and contingencies (Note 13)
Stockholders’ equity:
Preferred stock: $0.001 par value; 10,000 shares authorized and no shares issued and outstanding	0	0
Common stock: $0.001 par value; 150,000 shares authorized; 60,502 and 59,596 shares issued, respectively, and 49,283 and 48,854 shares outstanding, respectively	60	59
Additional paid-in capital	677,133	644,194
Treasury stock at cost: 11,219 and 10,742 shares of common stock at each period end, respectively	(313,645)	(300,114)
Accumulated other comprehensive loss	(110)	(148)
Retained earnings	72,737	163,794
Total stockholders’ equity	436,175	507,785
Total liabilities and stockholders’ equity	$ 1,099,696	$ 1,186,436