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Consolidated Statements Of Operations (USD $)
 12 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Revenues:    
Product sales $ 26,020,385 $ 16,535,796
Contract and other 486,436 158,279
Total revenues 26,506,821 16,694,075
Cost of revenues 10,577,370 7,520,284
Gross profit 15,929,451 9,173,791
Operating expenses:    
Selling, general and administrative 8,463,842 4,659,443
Research and development 2,483,938 2,062,158
Total operating expenses 10,947,780 6,721,601
Income from operations 4,981,671 2,452,190
Other income (expense):    
Other income (expense) 46,967 (662)
Unrealized gain on derivative revaluation   747,917
Total other income 46,967 747,255
Income from continuing operations before income taxes 5,028,638 3,199,445
Income tax expense 75,190 166,771
Income from continuing operations 4,953,448 3,032,674
Income (loss) from discontinued operations 69,454 (49,061)
Net income $ 5,022,902 $ 2,983,613
Net income per common share-continuing operations:    
Basic $ 0.16 $ 0.10
Diluted $ 0.15 $ 0.10
Net income per common share-discontinued operations:    
Basic $ 0.00 $ 0.00
Diluted $ 0.00 $ 0.00
Net income per common share:    
Basic $ 0.16 $ 0.10
Diluted $ 0.15 $ 0.10
Weighted average common shares outstanding:    
Basic 31,755,157 30,589,212
Diluted 32,722,632 31,111,330