Condensed Statements Of Operations And Comprehensive Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues:
Product sales	$ 3,201	$ 16,153	$ 5,310	$ 31,464
Royalties	9,577	67	18,998	232
License and other revenue	1,332	4,998	6,637	72,623
Total revenues	14,110	21,218	30,945	104,319
Costs and expenses:
Cost of sales	1,442	2,140	1,960	3,775
Research and development expense	3,525	4,043	7,007	9,197
Selling, general and administrative expense:
Promotion fee expense		11,055		21,317
Other selling, general and administrative expense	25,021	9,976	46,793	17,216
Total selling, general and administrative expense	25,021	21,031	46,793	38,533
Amortization of intangible assets	105		105
Gain on settlement agreement				(40,000)
Total costs and expenses	30,093	27,214	55,865	11,505
Income (loss) from operations	(15,983)	(5,996)	(24,920)	92,814
Other income (expense):
Interest and other income	204	357	347	436
Interest expense		(39)		(109)
Total other income (expense)	204	318	347	327
Net income (loss) before income taxes	(15,779)	(5,678)	(24,573)	93,141
Provision for income taxes	(1)	(1)	(9)	(3)
Net income (loss)	(15,780)	(5,679)	(24,582)	93,138
Change in unrealized gain (loss) on available-for-sale securities	(9)	97	84	86
Comprehensive income (loss)	$ (15,789)	$ (5,582)	$ (24,498)	$ 93,224
Basic net income (loss) per common share	$ (0.28)	$ (0.11)	$ (0.44)	$ 1.73
Diluted net income (loss) per common share	$ (0.28)	$ (0.11)	$ (0.44)	$ 1.67
Shares used in computing basic net income (loss) per common share	55,786,617	54,056,064	55,670,598	53,706,617
Shares used in computing diluted net income (loss) per common share	55,786,617	54,056,064	55,670,598	55,883,346