CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $)	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities:
Net loss	$ (28,455,000)	$ (25,544,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	712,000	621,000
Amortization of deferred financing costs and debt discount	706,000	471,000
Provision for doubtful accounts	99,000	274,000
Change in fair value of warrant liability	1,244,000	(3,714,000)
Change in fair value of option liability	490,000	680,000
Share-based compensation expense	2,907,000	2,578,000
Equity loss from investment in joint venture	128,000	153,000
Increases (decreases) in cash caused by changes in operating assets and liabilities:
Accounts receivable	698,000	(168,000)
Inventories	(93,000)	(775,000)
Other current assets	(253,000)	132,000
Other assets	16,000	(764,000)
Accounts payable and accrued expenses	254,000	(396,000)
Deferred revenues, related party	(2,413,000)	(1,231,000)
Deferred revenues	(97,000)	189,000
Long-term deferred rent	180,000	70,000
Net cash used in operating activities	(23,877,000)	(27,424,000)
Cash flows from investing activities:
Purchases of property and equipment	(1,077,000)	(458,000)
Net cash used in investing activities	(1,077,000)	(458,000)
Cash flows from financing activities:
Principal payments on long-term debt	(210,000)	(4,460,000)
Proceeds from long-term debt	0	9,444,000
Debt issuance costs and loan fees	0	(719,000)
Proceeds from exercise of employee stock options and warrants	988,000	2,849,000
Proceeds from sale of common stock	4,946,000	9,038,000
Costs from sale of common stock	(64,000)	(135,000)
Net cash provided by financing activities	5,660,000	16,017,000
Net decrease in cash and cash equivalents	(19,294,000)	(11,865,000)
Cash and cash equivalents at beginning of period	36,922,000	52,668,000
Cash and cash equivalents at end of period	17,628,000	40,803,000
Cash paid during period for:
Interest	1,906,000	1,458,000
Final payment fee on long-term debt	0	419,000
Supplemental schedule of non-cash operating, investing and financing activities:
Fair Value Of Warrants Allocated To additional paid in capital	0	267,000
Capital equipment lease	$ 0	$ 85,000

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Change in fair value of option liability for the period which are included in the statement of income (or changes in net assets) in operating expenses; the fair value of which was or is measured on a recurring basis using valuation techniques in which one or more significant inputs are unobservable in active markets (Level 3).