Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011
OPERATING ACTIVITIES:
Net loss	$ (11,601)		$ (5,213)
Adjustment to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	46		30
Amortization of debt issuance costs	208		208
Stock-based compensation	435		266
Change in fair value of warrant liability	(1,248)
Changes in operating assets and liabilities:
Accounts receivable	961		583
Prepaid expenses and other current assets	(97)		(124)
Accounts payable	256		305
Accrued liabilities	1,337		(50)
Accrued compensation and related expense	(250)		(107)
Accrued royalties	(45)		26
Accrued interest	1,181		(260)
Net cash used in operating activities	(8,817)		(4,336)
INVESTING ACTIVITIES:
Purchase of property and equipment	(24)		(20)
Decrease (increase) in short-term investments	9,002		2,999
Net cash provided by (used in) investing activities	8,978		2,979
Net increase (decrease) in cash and cash equivalents	161		(1,357)
Cash and cash equivalents at beginning of period	1,900	[1]	11,469
Cash and cash equivalents at end of period	2,061		10,112
Supplemental disclosure of cash flow information:
Interest received	8		7
Interest paid	3,541		5,184
Income taxes	$ 1		$ 1

[1] Derived from the Company's audited consolidated financial statements as of December 31, 2011. See accompanying notes to condensed consolidated financial statements.