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Statements of Stockholders' Equity (Unaudited) (USD $) | Total | Common Stock | Capital in Excess of Par Value | Accumulated Deficit | Treasury Stock | Accumulated Other Comprehensive (Loss)
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2013 | $ 9,395,869 us-gaap_StockholdersEquity | $ 326,115 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 10,011,339 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ (407,408)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ (514,341)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | $ (19,836)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Balance (in shares) at Dec. 31, 2013 |  | 3,261,148 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | 235,114 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |
Net income (loss) | (13,335)us-gaap_NetIncomeLoss | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (13,335)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Other comprehensive (loss), net of taxes | (1,408)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | (1,408)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Exercise of stock options | 3,150 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised | 0 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 962 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 2,188 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 0 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Exercise of stock options, Shares |  | 0 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | (1,000)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |
Stock-based compensation | 7,358 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 7,358 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Balance at Mar. 31, 2014 | 9,391,634 us-gaap_StockholdersEquity | 326,115 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 10,019,659 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (420,743)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (512,153)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | (21,244)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Balance (in shares) at Mar. 31, 2014 |  | 3,261,148 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | 234,114 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |
Balance at Dec. 31, 2014 | 9,258,368 us-gaap_StockholdersEquity | 326,115 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 10,042,305 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (574,567)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (512,154)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | (23,331)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Balance (in shares) at Dec. 31, 2014 |  | 3,261,148 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | 234,114 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |
Net income (loss) | 479,082 us-gaap_NetIncomeLoss | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 479,082 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Other comprehensive (loss), net of taxes | (3,906)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | (3,906)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Exercise of stock options | 5,250 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised | 0 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 3,062 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 2,188 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 0 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Exercise of stock options, Shares |  | 0 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | (1,000)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |
Stock-based compensation | 4,478 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 4,478 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Balance at Mar. 31, 2015 | $ 9,743,272 us-gaap_StockholdersEquity | $ 326,115 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 10,049,845 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ (95,485)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ (509,966)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | $ (27,237)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Balance (in shares) at Mar. 31, 2015 |  | 3,261,148 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | 233,114 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |

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