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Note 3 - Income Taxes (Details Textual) (USD $)	3 Months Ended								11 Months Ended	12 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 03, 2014	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]
Unrecognized Tax Liability for Uncertain Tax Positions	$ 0djco_UnrecognizedTaxLiabilityForUncertainTaxPositions				$ 0djco_UnrecognizedTaxLiabilityForUncertainTaxPositions					$ 0djco_UnrecognizedTaxLiabilityForUncertainTaxPositions	$ 0djco_UnrecognizedTaxLiabilityForUncertainTaxPositions
Income Tax Expense (Benefit)	475us-gaap_IncomeTaxExpenseBenefit	25us-gaap_IncomeTaxExpenseBenefit	(20)us-gaap_IncomeTaxExpenseBenefit	10us-gaap_IncomeTaxExpenseBenefit	485us-gaap_IncomeTaxExpenseBenefit	(335)us-gaap_IncomeTaxExpenseBenefit	(510)us-gaap_IncomeTaxExpenseBenefit	(430)us-gaap_IncomeTaxExpenseBenefit	(490,000)us-gaap_IncomeTaxExpenseBenefit	(490,000)us-gaap_IncomeTaxExpenseBenefit	790,000us-gaap_IncomeTaxExpenseBenefit	2,360,000us-gaap_IncomeTaxExpenseBenefit
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	705us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	13us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	73us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	(650)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	483us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1,161us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1,661us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1,264us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	141,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	141,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	4,569,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	7,901,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Effective Income Tax Rate Reconciliation, Percent										(347.50%)us-gaap_EffectiveIncomeTaxRateContinuingOperations	17.30%us-gaap_EffectiveIncomeTaxRateContinuingOperations	29.80%us-gaap_EffectiveIncomeTaxRateContinuingOperations
Liability for Uncertain Tax Positions, Noncurrent	3,244,000us-gaap_LiabilityForUncertainTaxPositionsNoncurrent									3,244,000us-gaap_LiabilityForUncertainTaxPositionsNoncurrent
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense									$ 537,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	$ 537,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense		$ (100,000)us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense
Domestic Tax Authority [Member] | Earliest Tax Year [Member]
Income Tax Disclosure [Abstract]
Open Tax Year										2010
ISD Corporation [Member] | Purchased Software and Customer Relationship [Member]
Income Tax Disclosure [Abstract]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life										15 years

X

- Definition

The unrecognized tax liability for the uncertain tax positions that were settled with the Internal Revenue Service.

+ References

No definition available.

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- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The noncurrent portion of the amount recognized for uncertain tax positions as of the balance sheet date.

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Tax year that remains open to examination under enacted tax laws, in CCYY format.

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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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