CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net loss	$ (7,808,000)	$ (6,779,000)
Depreciation and amortization	13,000	8,000
Stock-based compensation expense	68,000	222,000
Change in fair value of warrant and option liabilities	3,999,000	2,400,000
Change in fair value of convertible notes	1,312,000	3,107,000
Loss on extinguishment of convertible notes	1,283,000
Non-cash interest expense	95,000	66,000
Change in assets and liabilities:
Restricted cash	(500,000)
Accounts receivable	27,000	154,000
Inventories	71,000	(30,000)
Prepaid expenses and other current assets	(483,000)	(108,000)
Accounts payable	(39,000)	(19,000)
Deferred revenue	(69,000)
Accrued liabilities	(127,000)	30,000
Net cash flows used in operating activities	(2,158,000)	(949,000)
Cash flows from financing activities:
Net proceeds from sale of common stock and warrants	3,504,000
Net proceeds from issuance of convertible notes and warrants	250,000
Net cash provided by financing activities	3,754,000
Effect of exchange rate changes on cash and cash equivalents	9,000	(35,000)
Net (decrease) increase in cash and cash equivalents	1,605,000	(984,000)
Cash and cash equivalents at beginning of period	258,000	2,585,000
Cash and cash equivalents at end of period	1,863,000	1,601,000
Supplemental disclosure of cash flow information:
Cash paid for interest	62,000	50,000
Cashless exercise of warrants	$ 844,000