Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Cash Flows From Operating Activities:
Net Loss	$ (17,068)	$ (8,149)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	1,851	973
Stock issued as compensation	0	94
Stock issued for consulting fees	0	165
Stock issued for exclusive channel collaboration agreement	7,815	1,684
Stock issued for acquisition of program assets	1,169	0
Warrant expense	0	1,492
Change in fair value of warrant liability	0	242
Depreciation	63	144
Provision for uncollectible accounts receivable	442	414
Gain on sale of discontinued operations	(677)	0
Amortization of premium on investments	0	57
Loss on sale of short-term investments	0	20
Loss on sale of equipment	0	6
Impairment on loss of equipment	47	0
Gain on the settlement of accounts payable	0	(63)
Changes in operating assets and liabilities:
Accounts receivable	14	(480)
Prepaid expenses and other current assets	(2,544)	327
Deposits and other assets	(6)	60
Assets of discontinued operations	0	191
Accounts payable	7	153
Accrued liabilities	(29)	(181)
Liabilities of discontinued operations	0	(24)
Net Cash Used In Operating Activities	(8,916)	(2,875)
Cash Flows From Investing Activities:
Purchase of short-term investments	0	(4,370)
Proceeds from short-term investments	0	4,293
Purchase of property and equipment	(10)	0
Proceeds from the sale of equipment	0	2
Net Cash Used In Investing Activities	(10)	(75)
Cash Flows From Financing Activities:
Proceeds from issuance of common stock for stock option and warrant exercises	2,082	15
Proceeds from issuance of common stock for exclusive channel collaboration agreement	0	3
Proceeds from the issuance of common stock, net of issuance costs of $680 and $539, respectively	10,120	6,961
Net Cash Provided By Financing Activities	12,202	6,979
Net increase in cash	3,276	4,029
Cash at beginning of year	6,678	2,649
Cash at end of year	9,954	6,678
Supplemental disclosures of cash flow information:
Cash paid for interest	0	0
Cash paid for taxes	0	0
Supplemental disclosures of non-cash investing and financing activities:
Reclassification of warrant liability to additional paid-in-capital	$ 0	$ 1,734