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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Mar. 31, 2015 | Mar. 31, 2014
Net sales: |  |  |  |
Product | $ 3,487,933 us-gaap_SalesRevenueGoodsNet | $ 8,060,217 us-gaap_SalesRevenueGoodsNet | $ 8,037,453 us-gaap_SalesRevenueGoodsNet | $ 15,798,831 us-gaap_SalesRevenueGoodsNet
Engineering development contracts | 1,798,117 us-gaap_TechnologyServicesRevenue | 4,434,799 us-gaap_TechnologyServicesRevenue | 3,972,853 us-gaap_TechnologyServicesRevenue | 7,801,996 us-gaap_TechnologyServicesRevenue
Total net sales | 5,286,050 us-gaap_SalesRevenueNet | 12,495,016 us-gaap_SalesRevenueNet | 12,010,306 us-gaap_SalesRevenueNet | 23,600,827 us-gaap_SalesRevenueNet
Cost of sales: |  |  |  |
Product | 2,376,434 us-gaap_CostOfGoodsSold | 3,880,669 us-gaap_CostOfGoodsSold | 4,617,987 us-gaap_CostOfGoodsSold | 7,679,526 us-gaap_CostOfGoodsSold
Engineering development contracts | 1,326,220 us-gaap_TechnologyServicesCosts | 4,829,222 us-gaap_TechnologyServicesCosts | 3,047,118 us-gaap_TechnologyServicesCosts | 8,355,740 us-gaap_TechnologyServicesCosts
Total cost of sales | 3,702,654 us-gaap_CostOfGoodsAndServicesSold | 8,709,891 us-gaap_CostOfGoodsAndServicesSold | 7,665,105 us-gaap_CostOfGoodsAndServicesSold | 16,035,266 us-gaap_CostOfGoodsAndServicesSold
Gross profit | 1,583,396 us-gaap_GrossProfit | 3,785,125 us-gaap_GrossProfit | 4,345,201 us-gaap_GrossProfit | 7,565,561 us-gaap_GrossProfit
Operating expenses: |  |  |  |
Research and development | 647,473 us-gaap_ResearchAndDevelopmentExpense | 660,876 us-gaap_ResearchAndDevelopmentExpense | 1,302,472 us-gaap_ResearchAndDevelopmentExpense | 1,287,797 us-gaap_ResearchAndDevelopmentExpense
Selling, general and administrative | 1,573,888 us-gaap_SellingGeneralAndAdministrativeExpense | 2,034,609 us-gaap_SellingGeneralAndAdministrativeExpense | 3,514,379 us-gaap_SellingGeneralAndAdministrativeExpense | 3,779,500 us-gaap_SellingGeneralAndAdministrativeExpense
Total operating expenses | 2,221,361 us-gaap_OperatingExpenses | 2,695,485 us-gaap_OperatingExpenses | 4,816,851 us-gaap_OperatingExpenses | 5,067,297 us-gaap_OperatingExpenses
Operating income (loss) | (637,965)us-gaap_OperatingIncomeLoss | 1,089,640 us-gaap_OperatingIncomeLoss | (471,650)us-gaap_OperatingIncomeLoss | 2,498,264 us-gaap_OperatingIncomeLoss
Interest income | 6,013 us-gaap_InvestmentIncomeInterest | 5,299 us-gaap_InvestmentIncomeInterest | 11,898 us-gaap_InvestmentIncomeInterest | 10,965 us-gaap_InvestmentIncomeInterest
Other income | 9,407 us-gaap_OtherNonoperatingIncomeExpense | 8,901 us-gaap_OtherNonoperatingIncomeExpense | 20,229 us-gaap_OtherNonoperatingIncomeExpense | 19,368 us-gaap_OtherNonoperatingIncomeExpense
Income (loss) before income taxes | (622,545)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 1,103,840 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | (439,523)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 2,528,597 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Income tax expense (benefit) | (258,454)us-gaap_IncomeTaxExpenseBenefit | 319,623 us-gaap_IncomeTaxExpenseBenefit | (669,174)us-gaap_IncomeTaxExpenseBenefit | 735,784 us-gaap_IncomeTaxExpenseBenefit
Net income (loss) | $ (364,091)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 784,217 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 229,651 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 1,792,813 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Net income (loss) per common share: |  |  |  |
Basic (in dollars per share) | $ (0.02)us-gaap_EarningsPerShareBasic | $ 0.05 us-gaap_EarningsPerShareBasic | $ 0.01 us-gaap_EarningsPerShareBasic | $ 0.11 us-gaap_EarningsPerShareBasic
Diluted (in dollars per share) | $ (0.02)us-gaap_EarningsPerShareDiluted | $ 0.05 us-gaap_EarningsPerShareDiluted | $ 0.01 us-gaap_EarningsPerShareDiluted | $ 0.10 us-gaap_EarningsPerShareDiluted
Weighted average shares outstanding: |  |  |  |
Basic (in shares) | 16,925,028 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 16,915,823 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 16,940,377 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 16,901,955 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Diluted (in shares) | 16,925,028 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 17,152,678 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 17,043,735 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 17,123,512 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding

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