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CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (UNAUDITED) [Abstract]        
Product revenues $ 1,614,000 $ 935,000 $ 2,516,000 $ 1,965,000
Cost of product revenues 1,296,000 766,000 1,894,000 1,187,000
Gross profit 318,000 169,000 622,000 778,000
Development revenues:        
Government contracts and other 1,847,000 356,000 3,291,000 759,000
Operating expenses:        
Research and development 6,048,000 4,674,000 10,012,000 8,966,000
Sales and marketing 654,000 1,934,000 1,493,000 3,861,000
General and administrative 2,793,000 4,602,000 5,292,000 8,942,000
Change in fair value of warrant liabilities (13,122,000) 0 2,322,000 0
Total operating expenses (3,627,000) 11,210,000 19,119,000 21,769,000
Operating income (loss) 5,792,000 (10,685,000) (15,206,000) (20,232,000)
Other income (expense):        
Income (loss) on asset disposal (1,000) (1,000) 8,000 (1,000)
Loss on debt extinguishment (260,000) 0 (260,000) 0
Interest income 3,000 1,000 3,000 3,000
Interest expense (936,000) (1,085,000) (2,007,000) (2,026,000)
Other income (expense), net (148,000) (58,000) (47,000) 28,000
Total other expense (1,342,000) (1,143,000) (2,303,000) (1,996,000)
Net income (loss) 4,450,000 (11,828,000) (17,509,000) (22,228,000)
Beneficial conversion feature for convertible preferred stock 0 0 (661,000) 0
Net income (loss) allocable to common stockholders $ 4,450,000 $ (11,828,000) $ (18,170,000) $ (22,228,000)
Net income (loss) per share allocable to common stockholders        
Basic (in dollars per share) $ 0.03 $ (0.15) $ (0.15) $ (0.29)
Diluted (in dollars per shares) $ 0.03 $ (0.15) $ (0.15) $ (0.29)
Weighted average shares used in calculating net income (loss) per share allocable to common stockholders        
Basic (in shares) 138,992,108 76,682,643 122,691,044 75,399,647
Diluted (in dollars per shares) 147,368,073 76,682,643 122,691,044 75,399,647
Comprehensive income (loss):        
Net income (loss) $ 4,450,000 $ (11,828,000) $ (17,509,000) $ (22,228,000)
Other comprehensive income (loss) - foreign currency translation adjustments 215,000 193,000 251,000 143,000
Comprehensive income (loss) $ 4,665,000 $ (11,635,000) $ (17,258,000) $ (22,085,000)