CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 182,192	[1]	$ 131,212	[2]
Restricted investment	20,000	[1]	20,000	[2]
Short-term investments	5,021	[1]	17,477	[2]
Receivables from licensees	150	[1]	366	[2]
Deferred tax assets	235	[1]	1,613	[2]
Notes receivable, current	44,682	[1]	7,504	[2]
Prepaid and other current assets	6,427	[1]	4,813	[2]
Total current assets	258,707	[1]	182,985	[2]
Property and equipment, net	56	[1]	59	[2]
Long-term investments	0		0
Notes receivable and other long-term receivables	45,502	[1]	85,704	[2]
Long-term deferred tax assets	3,614	[1]	4,552	[2]
Other assets	4,931	[1]	6,666	[2]
Total assets	312,810	[1]	279,966	[2]
Current liabilities:
Accounts payable	504	[1]	1,074	[2]
Accrued liabilities	68,281	[1]	9,400	[2]
Total current liabilities	68,785	[1]	10,474	[2]
Convertible notes payable	312,613	[1]	309,952	[2]
Other long-term liabilities	25,083	[1]	27,662	[2]
Total liabilities	406,481	[1]	348,088	[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, 250,000 shares authorized; 139,816 and 139,816 shares issued and outstanding at March 31, 2013 and December 31, 2012, respectively	1,398	[1]	1,398	[2]
Additional paid-in capital	(233,910)	[1]	(234,066)	[2]
Accumulated other comprehensive loss	(277)	[1]	(5,088)	[2]
Retained earnings	139,118	[1]	169,634	[2]
Total stockholders' deficit	(93,671)	[1]	(68,122)	[2]
Total liabilities and stockholders' deficit	$ 312,810	[1]	$ 279,966	[2]

[1] unaudited

[2] Note 1