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Note 12 - Operating Segments (Details Textual) (USD $) | 3 Months Ended | 9 Months Ended | 7 Months Ended
--- | --- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2013
Segment Reporting [Abstract] |  |  |  |  |
Number of Reportable Segments |  |  | 2 us-gaap_NumberOfReportableSegments |  |
Amortization of Intangible Assets | $ 1,223,000 us-gaap_AmortizationOfIntangibleAssets | $ 476,000 us-gaap_AmortizationOfIntangibleAssets | $ 3,642,000 us-gaap_AmortizationOfIntangibleAssets | $ 1,111,000 us-gaap_AmortizationOfIntangibleAssets |
New Dawn [Member] |  |  |  |  |
Segment Reporting [Abstract] |  |  |  |  |
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual |  | 2,740,000 us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = djco_NewDawnMember |  |  | 6,430,000 us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = djco_NewDawnMember
Business Combination Pro Forma Information Expenses Since Acquisition Date Actual |  | 3,110,000 djco_BusinessCombinationProFormaInformationExpensesSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = djco_NewDawnMember |  |  | 7,168,000 djco_BusinessCombinationProFormaInformationExpensesSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = djco_NewDawnMember
Amortization of Intangible Assets |  | $ 476,000 us-gaap_AmortizationOfIntangibleAssets / us-gaap_BusinessAcquisitionAxis = djco_NewDawnMember | $ 1,425,000 us-gaap_AmortizationOfIntangibleAssets / us-gaap_BusinessAcquisitionAxis = djco_NewDawnMember |  | $ 1,111,000 us-gaap_AmortizationOfIntangibleAssets / us-gaap_BusinessAcquisitionAxis = djco_NewDawnMember

X
- Definition Pro forma information about actual expenses since the acquisition date. + References No definition available. + Details
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Namespace Prefix: | djco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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X
- Definition This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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Balance Type: | credit
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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- Details
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- Details
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Balance Type: |
Period Type: |