Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 132,493	$ 122,272
Restricted cash and cash equivalents		300
Investments	17,049	21,601
Accounts receivable, net	77,390	48,939
Interest receivable on Secured Note	5,011	5,011
Income tax receivable	1,685	2,186
Other current assets	14,696	8,035
Total current assets	248,324	208,344
Property and equipment, net	121,349	119,734
Right-of-use assets	34,545	27,770
Secured Note receivable, net	964,912	969,912
Amortizable intangible assets, net	199,952	202,057
Goodwill	160,766	160,766
Other assets	1,754	1,706
Total assets	1,731,602	1,690,289
Current liabilities
Accounts payable	19,222	14,835
Accrued compensation and benefits	22,602	20,800
Accrued liabilities	20,943	16,771
Income taxes payable	25,249	6,576
Deferred revenue	8,173	20
Current portion of lease liability	3,751	3,084
Current portion of notes payable	33,144	33,144
Total current liabilities	133,084	95,230
Deferred income taxes, noncurrent	18,840	18,320
Other long-term liability	11	13
Lease liability, less current portion	32,171	25,519
Notes payable, less current portion	99,488	107,774
Total liabilities	283,594	246,856
Commitments and contingencies
Stockholders' equity
Preferred stock, $0.01 par value, 10,000 shares authorized; 0 shares issued and outstanding at March 31, 2020 and December 31, 2019
Common stock, $0.01 par value, 100,000 shares authorized; 53,221 and 53,054 shares issued and 47,413 and 48,105 shares outstanding at March 31, 2020 and December 31, 2019, respectively	532	531
Treasury stock, at cost, 5,808 and 4,949 shares of common stock at March 31, 2020 and December 31, 2019, respectively	(235,071)	(169,365)
Additional paid-in capital	273,650	270,923
Retained earnings	1,408,897	1,341,344
Total stockholders' equity	1,448,008	1,443,433
Total liabilities and stockholders' equity	$ 1,731,602	$ 1,690,289