CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 416,668	[1]	$ 291,377	[2]
Short-term investments	2,252	[1]	2,310	[2]
Receivables from licensees and other	0	[1]	300	[2]
Deferred tax assets	0	[1]	375	[2]
Notes receivable	63,439	[1]	57,597	[2]
Prepaid and other current assets	18,308	[1]	3,938	[2]
Total current assets	500,667	[1]	355,897	[2]
Property and equipment, net	52	[1]	62	[2]
Royalty rights	269,668	[1]	259,244	[2]
Notes and other receivables, long-term	302,367	[1]	305,615	[2]
Long-term deferred tax assets	34,917	[1]	33,799	[2]
Other assets	6,462	[1]	7,733	[2]
Total assets	1,114,133	[1]	962,350	[2]
Current liabilities:
Accounts payable	615	[1]	318	[2]
Accrued liabilities	81,481	[1]	8,876	[2]
Accrued Income Taxes, Current	0	[1]	3,293	[2]
Deferred Tax Liabilities	6,667		0
Term loan payable	99,393	[1]	0	[1]
Convertible Notes Payable, Current	154,592	[1]	175,496	[2]
Total current liabilities	342,748	[1]	187,983	[2]
Convertible notes payable	277,975	[1]	276,228	[2]
Other long-term liabilities	41,466	[1]	37,702	[2]
Total liabilities	662,189	[1]	501,913	[2]
Commitments and contingencies (Note 8)		[1]		[2]
Stockholders' deficit:
Preferred stock, par value $0.01 per share, 10,000 shares authorized; no shares issued and outstanding	0	[1]	0	[2]
Common stock, par value $0.01 per share, 350,000 shares authorized; 163,534 and 162,186 shares issued and outstanding at March 31, 2015 and December 31, 2014, respectively	1,635	[1]	1,622	[2]
Additional paid-in capital	(119,386)	[1]	(119,874)	[2]
Accumulated other comprehensive gain	7,910	[1]	2,949	[2]
Retained earnings	561,785	[1]	575,740	[2]
Total stockholders' equity	451,944	[1]	460,437	[2]
Total liabilities and stockholders' equity	$ 1,114,133	[1]	$ 962,350	[2]

[1] unaudited

[2] Note 1