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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $)
 3 Months Ended 6 Months Ended
Jan. 31, 2015
Jan. 31, 2014
Jan. 31, 2015
Jan. 31, 2014
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) [Abstract]        
Net income (loss) $ 328,913us-gaap_NetIncomeLoss $ (57,050)us-gaap_NetIncomeLoss $ 767,585us-gaap_NetIncomeLoss $ 378,974us-gaap_NetIncomeLoss
Unrealized gain (loss) on available-for-sale securities:        
Unrealized holding gains (losses) arising during the period, net of taxes of ($10,000) and ($15,000) for the three months ended January 31, 2015 and 2014, respectively, and $23,000 and ($6,000) for the six months ended January 31, 2015 and 2014, respectively (12,823)us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax (16,288)us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax 29,339us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax (5,019)us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
Reclassification adjustment for net gains included in net income, net of taxes of ($69,000) for the six months ended January 31, 2014 (Note 12)          (86,187)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax
Unrealized gains (losses) on available-for-sale securities, net of taxes (12,823)us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax (16,288)us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax 29,339us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax (91,206)us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax
Comprehensive income (loss) $ 316,090us-gaap_ComprehensiveIncomeNetOfTax $ (73,338)us-gaap_ComprehensiveIncomeNetOfTax $ 796,924us-gaap_ComprehensiveIncomeNetOfTax $ 287,768us-gaap_ComprehensiveIncomeNetOfTax