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Condensed Consolidated Statements of Operations (Unaudited) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Statements Of Operations [Abstract]        
Net revenues $ 1,679 $ 1,287 $ 4,817 $ 2,109
Cost of revenues 337 333 1,080 726
Gross margin 1,342 954 3,737 1,383
Operating expenses:        
Product research and development 1,451 385 3,616 1,043
Sales and marketing 920 411 3,437 1,126
General and administrative 1,086 518 3,772 2,303
Total operating expenses 3,457 1,314 10,825 4,472
Operating loss (2,115) (360) (7,088) (3,089)
Other expense, net:        
Interest expense    (76)    (211)
Non-cash items related to debt discounts and deferred financing fees and the valuation of conversion features and warrants    (1,475)    (11,043)
Total other expense, net    (1,551)    (11,254)
Loss before provision for income taxes (2,115) (1,911) (7,088) (14,343)
Provision for income taxes 29 19 71 30
Net loss $ (2,144) $ (1,930) $ (7,159) $ (14,373)
Loss per common share:        
Basic and diluted loss per share $ (0.06) $ (0.07) $ (0.22) $ (0.55)
Basic and diluted - weighted average shares used in per share computations 33,021 27,934 32,934 26,050