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Consolidated Statements of Operations (USD $) | 12 Months Ended
--- | ---
Sep. 30, 2013 | Sep. 30, 2012
Income Statement [Abstract] |  |
Net revenue | $ 48,943,000 | $ 63,182,000
Costs and expenses: |  |
Production costs | 37,940,000 | 51,152,000
Product engineering and development | 1,713,000 | 2,339,000
Selling, general and administrative | 6,712,000 | 9,298,000
Total operating expenses | 46,365,000 | 62,789,000
Operating income | 2,578,000 | 393,000
Other income (expenses): |  |
Interest and dividend income, net of fees | 2,281,000 | 2,269,000
Realized and unrealized gains (losses) on marketable securities, net | 1,456,000 | 4,120,000
Other | 18,000 | 70,000
Other income (expenses) total | 3,755,000 | 6,459,000
Income before income taxes | 6,333,000 | 6,852,000
Income tax expense (benefit) | (392,000) | 2,380,000
Net income | $ 6,725,000 | $ 4,472,000
Basic earnings per common share: |  |
Net income | $ 0.71 | $ 0.47
Diluted earnings per common share: |  |
Net income | $ 0.71 | $ 0.47

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