Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2010	$ 23	$ 47,280	$ (43,724)	$ 3,579
Balance (in shares) at Dec. 31, 2010	23,338,707
Stock-based compensation	0	973	0	973
Issuance of common stock for employee compensation	0	94	0	94
Issuance of common stock for employee compensation (in shares)	73,585
Issuance of common stock for exclusive channel collaboration agreement	3	1,684	0	1,687
Issuance of common stock for exclusive channel collaboration agreement (in shares)	3,123,558
Issuance of common stock for consulting fees	0	165	0	165
Issuance of common stock for consulting fees (in shares)	171,796
Issuance of common stock for stock options and warrants exercised	0	15	0	15
Issuance of common stock for stock options and warrants exercised (in shares)	38,948
Issuance of common stock, net of issuance costs	5	6,956	0	6,961
Issuance of common stock, net of issuance costs (in shares)	4,545,926
Warrant liability reclassified to stockholders' equity	0	1,734	0	1,734
Net loss	0	0	(8,149)	(8,149)
Balance at Dec. 31, 2011	31	58,901	(51,873)	7,059
Balance (in shares) at Dec. 31, 2011	31,292,520
Stock-based compensation	0	1,852	0	1,852
Issuance of common stock for exclusive channel collaboration agreement	3	7,811	0	7,814
Issuance of common stock for exclusive channel collaboration agreement (in shares)	3,552,210
Issuance of common stock for acquisition of program assets	1	1,168	0	1,169
Issuance of common stock for acquisition of program assets (in shares)	625,000
Issuance of common stock for stock options and warrants exercised	2	2,080	0	2,082
Issuance of common stock for stock options and warrants exercised (in shares)	2,143,018
Issuance of common stock, net of issuance costs	7	10,113	0	10,120
Issuance of common stock, net of issuance costs (in shares)	6,750,000
Net loss	0	0	(17,068)	(17,068)
Balance at Dec. 31, 2012	$ 44	$ 81,925	$ (68,941)	$ 13,028
Balance (in shares) at Dec. 31, 2012	44,362,748