STATEMENTS OF POTENTIALLY REDEEMABLE EQUITY AND STOCKHOLDERS' EQUITY (USD $) In Thousands	Potentially Redeemable Equity [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Total
Balance at Aug. 04, 2004	$ 0	$ 17	$ 146,125	$ (27,762)	$ 118,380
Balance (in shares) at Aug. 04, 2004		34,550
Acquisition of CBI, August 5, 2004	0	2	23,451	0	23,453
Acquisition of CBI, August 5, 2004 (in shares)		3,248
Acquisition of AzERx, February 27, 2006	0	1	7,763	0	7,764
Acquisition of AzERx, February 27, 2006 (in shares)		1,355
Exercise of common stock options	0	0	4,579	0	4,579
Exercise of common stock options (in shares)		997
Stock-based compensation cost	0	0	3,190	0	3,190
Compensation earned on stock awards	0	0	1,200	0	1,200
Compensation earned on stock awards (in shares)		494
Sale of common stock	0	1	3,375	0	3,376
Sale of common stock (in shares)		1,263
Common stock purchased and retired	0	(1)	(1,040)	0	(1,041)
Common stock purchased and retired (in shares)		(1,132)
Recognized uncertain tax position	0	0	0	(363)	(363)
Net loss	0	0	0	(125,810)	(125,810)
Balance at Dec. 31, 2009	0	20	188,643	(153,935)	34,728
Balance (in shares) at Dec. 31, 2009		40,775
Recognition of potentially redeemable equity, net of amortization	15,556	0	0	(15,556)	(15,556)
Stock-based compensation cost	0	0	156	0	156
Reclassification of share-based awards liability	0	0	(541)	0	(541)
Net loss	0	0	0	(10,871)	(10,871)
Balance at Dec. 31, 2010	15,556	20	188,258	(180,362)	7,916
Balance (in shares) at Dec. 31, 2010		40,775
De-recognition of potentially redeemable equity, net of amortization	(15,556)	0	0	15,556	15,556
Stock-based compensation cost	0	0	159	0	159
Reclassification of share-based awards liability	0	0	657	0	657
Net loss	0	0	0	(9,711)	(9,711)
Balance at Dec. 31, 2011	$ 0	$ 20	$ 189,074	$ (174,517)	$ 14,577
Balance (in shares) at Dec. 31, 2011		40,775