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CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $)
 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Cash flows from operating activities:    
Net loss $ (17,208,000) $ (17,209,000)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 453,000 400,000
Amortization of deferred financing costs and debt discount 470,000 471,000
Provision for doubtful accounts 19,000 235,000
Change in fair value of warrants 381,000 (2,178,000)
Change in fair value of option liabilities 190,000 110,000
Share-based compensation expense 1,977,000 1,721,000
Equity loss from investment in joint venture 86,000 102,000
Increases (decreases) in cash caused by changes in operating assets and liabilities:    
Accounts receivable 258,000 (623,000)
Inventories 210,000 (513,000)
Other current assets (278,000) (15,000)
Other assets 17,000 (905,000)
Accounts payable and accrued expenses (268,000) 92,000
Deferred revenues, related party (2,413,000) (1,231,000)
Deferred revenues 52,000 35,000
Long-term deferred rent 96,000 (24,000)
Net cash used in operating activities (15,958,000) (19,532,000)
Cash flows from investing activities:    
Purchases of property and equipment (886,000) (433,000)
Net cash used in investing activities (886,000) (433,000)
Cash flows from financing activities:    
Principal payments on long-term obligations (140,000) (2,230,000)
Proceeds from exercise of employee stock options 951,000 2,756,000
Proceeds from sale of common stock 4,946,000 0
Costs from sale of common stock (64,000) 0
Net cash provided by financing activities 5,693,000 526,000
Net decrease in cash and cash equivalents (11,151,000) (19,439,000)
Cash and cash equivalents at beginning of period 36,922,000 52,668,000
Cash and cash equivalents at end of period 25,771,000 33,229,000
Cash paid during period for:    
Interest 1,257,000 989,000
Supplemental schedule of non-cash operating, investing and financing activities:    
Capital equipment lease $ 0 $ 94,000