CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accrued Income Taxes, Current	$ 3,372	$ 3,293
Current assets:
Cash and cash equivalents	218,883	291,377
Short-term investments	1,469	2,310
Receivables from licensees	0	300
Deferred tax assets	981	375
Notes receivable	58,398	57,597
Prepaid and other current assets	2,979	3,938
Total current assets	282,710	355,897
Property and equipment, net	31	62
Royalty rights	399,204	259,244
Notes and other receivables, long-term	306,507	305,615
Long-term deferred tax assets	16,172	33,799
Other assets	11,554	7,733
Total assets	1,016,178	962,350
Current liabilities:
Accounts payable	394	318
Accrued liabilities	8,009	8,876
Term loan payable	24,966	0
Convertible Notes Payable, Current	0	175,496
Total current liabilities	36,741	187,983
Convertible notes payable	232,835	276,228
Other long-term liabilities	50,650	37,702
Total liabilities	$ 320,226	$ 501,913
Commitments and Contingencies
Stockholders' equity (deficit):
Preferred stock, par value $0.01 per share, 10,000 shares authorized; no shares issued and outstanding	$ 0	$ 0
Common stock, par value $0.01 per share, 350,000 shares authorized; 162,186 and 139,935 shares issued and outstanding at December 31, 2014 and 2013, respectively	1,643	1,622
Additional paid-in capital	(117,983)	(119,874)
Accumulated other comprehensive loss	2,256	2,949
Retained earnings	810,036	575,740
Total stockholders' equity (deficit)	695,952	460,437
Total liabilities and stockholders' equity (deficit)	$ 1,016,178	$ 962,350