Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 39,911	$ 52,022
Investments, current	15,263	6,035
Product royalties receivable	13,595	14,175
Unbilled accounts receivable		732
Accounts receivable, net	2,694	1,360
Deferred tax assets, current	1,273	874
Deferred charge, current	673	673
Income taxes receivable	2,013
Restricted cash, current	26,141	15,113
Inventory	261
Prepaid expenses and other current assets	3,835	1,930
Total current assets	105,659	92,914
Investments, non-current	7,259	14,408
Property and equipment, net	1,278	1,540
Intangible assets, net	6,686	7,415
Deferred tax assets, non-current	1,162	1,654
Deferred charge, non-current	4,709	5,213
Restricted cash, non-current	2,430	3,832
Other assets	537	820
Total assets	129,720	127,796
Current liabilities:
Accounts payable	2,934	5,496
Accrued expenses	6,211	10,595
Deferred revenue, current	1,148	3,700
Income tax payable		148
Notes payable, current	28,114	19,129
Other current liabilities	1,286	1,003
Total current liabilities	39,693	40,071
Notes payable, non-current	29,812	33,722
Deferred revenue, non-current	6,490	7,093
Deferred tax liability, non-current	2,632	2,627
Other liabilities	1,296	1,253
Total liabilities	79,923	84,766
Preferred stock, $0.01 par value; 5,000,000 shares authorized at September 30, 2013 and December 31, 2012; no shares issued and outstanding at September 30, 2013 and December 31, 2012	0	0
Class A common stock, $0.01 par value; 270,000,000 shares authorized at September 30, 2013 and December 31, 2012; 42,389,346 and 41,964,905 shares issued and outstanding at September 30, 2013 and December 31, 2012, respectively	423	420
Additional paid-in capital	65,758	62,521
Accumulated other comprehensive income	15,763	16,166
Treasury stock, at cost; 524,792 and 457,030 shares	(2,313)	(1,977)
Accumulated deficit	(29,834)	(34,100)
Total stockholders' equity	49,797	43,030
Total liabilities and stockholders' equity	$ 129,720	$ 127,796