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Condensed Consolidated Statements Of Operations (USD $)
 3 Months Ended 6 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Mar. 31, 2012
Mar. 31, 2011
Revenues:        
Product sales $ 2,340,731 $ 15,297,871 $ 5,885,784 $ 17,435,860
Contract and other 59,710 205,204 126,292 272,603
Total revenues 2,400,441 15,503,075 6,012,076 17,708,463
Cost of revenues 1,083,438 4,635,260 2,946,479 5,848,273
Gross profit 1,317,003 10,867,815 3,065,597 11,860,190
Operating expenses:        
Selling, general and administrative 1,193,294 4,390,379 2,249,853 5,444,105
Research and development 429,390 665,690 810,708 1,044,910
Total operating expenses 1,622,684 5,056,069 3,060,561 6,489,015
(Loss) Income from operations (305,681) 5,811,746 5,036 5,371,175
Interest income 6,778 4,506 19,722 8,190
(Loss) income from continuing operations before income taxes (298,903) 5,816,252 24,758 5,379,365
Income tax (benefit) expense (7,015) 112,095 2,700 112,095
(Loss) income from continuing operations (291,888) 5,704,157 22,058 5,267,270
Income from discontinued operations, net of tax   105   81,625
Net (loss) income $ (291,888) $ 5,704,262 $ 22,058 $ 5,348,895
Net (loss) income per common share - continuing operations:        
Basic $ (0.01) $ 0.18 $ 0.00 $ 0.17
Diluted $ (0.01) $ 0.17 $ 0.00 $ 0.17
Net income per common share - discontinued operations:        
Basic $ 0.00 $ 0.00 $ 0.00 $ 0.00
Diluted $ 0.00 $ 0.00 $ 0.00 $ 0.00
Net (loss) income per common share:        
Basic $ (0.01) $ 0.18 $ 0.00 $ 0.17
Diluted $ (0.01) $ 0.17 $ 0.00 $ 0.17
Weighted average common shares outstanding:        
Basic 32,374,499 31,687,779 32,374,499 31,154,649
Diluted 32,374,499 32,606,414 33,006,994 32,068,244