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CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $)
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Cash flows from operating activities:    
Net loss $ (9,325,000) $ (12,072,000)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 220,000 194,000
Amortization of deferred financing costs and debt discount 237,000 240,000
Increase (decrease) in allowance for doubtful accounts (24,000) 21,000
Change in fair value of warrant liability 130,000 3,471,000
Change in fair value of option liability (270,000) (290,000)
Stock-based compensation 942,000 881,000
Equity loss from investment in joint venture 50,000 46,000
Increases (decreases) in cash caused by changes in operating assets and liabilities:    
Accounts receivable 859,000 278,000
Inventories (56,000) (174,000)
Other current assets (298,000) (130,000)
Other assets (22,000) (922,000)
Accounts payable and accrued expenses (83,000) (854,000)
Deferred revenues, related party 0 (1,231,000)
Deferred revenues (68,000) (10,000)
Long-term deferred rent (6,000) (12,000)
Net cash used in operating activities (7,714,000) (10,564,000)
Cash flows from investing activities:    
Purchases of property and equipment (25,000) (131,000)
Net cash used in investing activities (25,000) (131,000)
Cash flows from financing activities:    
Principal payments on long-term obligations (71,000) 0
Proceeds from exercise of employee stock options and warrants 947,000 674,000
Proceeds from sale of common stock 4,396,000 0
Costs from sale of common stock (56,000) 0
Net cash provided by financing activities 5,216,000 674,000
Net decrease in cash and cash equivalents (2,523,000) (10,021,000)
Cash and cash equivalents at beginning of period 36,922,000 52,668,000
Cash and cash equivalents at end of period 34,399,000 42,647,000
Cash paid during period for:    
Interest 625,000 499,000
Supplemental schedule of non-cash operating, investing and financing activities:    
Capital equipment lease 0 101,000
Net increase in purchases of property and equipment included in accounts payable $ 795,000 $ 0