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Note 6 - Summarized Financial Information for Reportable Segments (Details) (USD $)

3 Months Ended

12 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2012

Advertising, net

$ 11,435,000us-gaap_AdvertisingRevenue

$ 14,472,000us-gaap_AdvertisingRevenue

$ 19,221,000us-gaap_AdvertisingRevenue

Circulation

6,038,000us-gaap_SubscriptionRevenue

6,346,000us-gaap_SubscriptionRevenue

6,530,000us-gaap_SubscriptionRevenue

Advertising service fees and other

2,800,000us-gaap_OtherSalesRevenueNet

3,012,000us-gaap_OtherSalesRevenueNet

3,205,000us-gaap_OtherSalesRevenueNet

Licensing and maintenance fees

12,987,000us-gaap_LicenseAndMaintenanceRevenue

9,942,000us-gaap_LicenseAndMaintenanceRevenue

2,205,000us-gaap_LicenseAndMaintenanceRevenue

Consulting fees

4,002,000djco_ConsultingRevenue

3,406,000djco_ConsultingRevenue

713,000djco_ConsultingRevenue

Other public service fees

6,161,000djco_OtherPublicServiceRevenue

498,000djco_OtherPublicServiceRevenue

Income (loss) from operations

(140)us-gaap_IncomeLossFromContinuingOperations

1,505us-gaap_IncomeLossFromContinuingOperations

(2,190,000)us-gaap_IncomeLossFromContinuingOperations

3,789,000us-gaap_IncomeLossFromContinuingOperations

8,682,000us-gaap_IncomeLossFromContinuingOperations

Pretax income (loss)

705us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

483us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

141,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

4,569,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

7,901,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

Benefit from (provision for) income taxes

(475)us-gaap_IncomeTaxExpenseBenefit

(485)us-gaap_IncomeTaxExpenseBenefit

490,000us-gaap_IncomeTaxExpenseBenefit

(790,000)us-gaap_IncomeTaxExpenseBenefit

(2,360,000)us-gaap_IncomeTaxExpenseBenefit

Net income

1,180us-gaap_NetIncomeLoss

968us-gaap_NetIncomeLoss

631,000us-gaap_NetIncomeLoss

3,779,000us-gaap_NetIncomeLoss

5,541,000us-gaap_NetIncomeLoss

Total assets

243,877,000us-gaap_Assets

203,063,000us-gaap_Assets

243,877,000us-gaap_Assets

203,063,000us-gaap_Assets

120,964,000us-gaap_Assets

Capital expenditures

435,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment

280,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment

372,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment

Amortization of Intangible Assets

4,866,000us-gaap_AmortizationOfIntangibleAssets

1,865,000us-gaap_AmortizationOfIntangibleAssets

0us-gaap_AmortizationOfIntangibleAssets

Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net

1,719,000us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet

2,855,000us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet

Journal Technologies [Member]

Licensing and maintenance fees

12,987,000us-gaap_LicenseAndMaintenanceRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

9,942,000us-gaap_LicenseAndMaintenanceRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

^[1]

2,205,000us-gaap_LicenseAndMaintenanceRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

^[2]

Consulting fees

4,002,000djco_ConsultingRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

3,406,000djco_ConsultingRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

^[1]

713,000djco_ConsultingRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

^[2]

Other public service fees

6,161,000djco_OtherPublicServiceRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

498,000djco_OtherPublicServiceRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

^[1]

Income (loss) from operations

(5,309,000)us-gaap_IncomeLossFromContinuingOperations
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

(4,185,000)us-gaap_IncomeLossFromContinuingOperations
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

(2,195,000)us-gaap_IncomeLossFromContinuingOperations
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

^[2]

Pretax income (loss)

(5,749,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

(4,138,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

^[1]

(2,188,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

^[2]

Benefit from (provision for) income taxes

2,350,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

2,263,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

^[1]

980,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

^[2]

Net income

(3,399,000)us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

(1,875,000)us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

^[1]

(1,208,000)us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

^[2]

Total assets

51,973,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

47,611,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

51,973,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

47,611,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

1,131,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

^[2]

Capital expenditures

325,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

184,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

^[1]

52,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

^[2]

Amortization of Intangible Assets

4,866,000us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

1,865,000us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_StatementBusinessSegmentsAxis
= djco_JournalTechnologiesMember

^[1]

Traditional Business [Member]

Advertising, net

11,435,000us-gaap_AdvertisingRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

14,472,000us-gaap_AdvertisingRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

19,221,000us-gaap_AdvertisingRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

Circulation

6,038,000us-gaap_SubscriptionRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

6,346,000us-gaap_SubscriptionRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

6,530,000us-gaap_SubscriptionRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

Advertising service fees and other

2,800,000us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

3,012,000us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

3,205,000us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

Income (loss) from operations

3,119,000us-gaap_IncomeLossFromContinuingOperations
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

7,974,000us-gaap_IncomeLossFromContinuingOperations
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

10,877,000us-gaap_IncomeLossFromContinuingOperations
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

Pretax income (loss)

5,890,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

8,707,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

10,089,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

Benefit from (provision for) income taxes

(1,860,000)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

(3,053,000)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

(3,340,000)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

Net income

4,030,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

5,654,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

6,749,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

Total assets

191,904,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

155,452,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

191,904,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

155,452,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

119,833,000us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

Capital expenditures

110,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

96,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

320,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net

$ 1,719,000us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

$ 2,855,000us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet
/ us-gaap_StatementBusinessSegmentsAxis
= djco_TraditionalBusinessMember

[1]	Includes (i) New Dawn’s financial results from December 5, 2012 through September 30, 2013 with revenues of $10,403,000 and expenses of $10,625,000 (including intangible amortization expenses of $1,587,000), and (ii)ISD’s September 2013 financial results with revenues of $784,000 and expenses of $694,000 (including intangible amortization expenses of $278,000).
[2]	Includes only Sustain’s financial results.

X

- Definition

Revenues generated by providing consulting services during the period.

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- Definition

Revenue from the sale of advertising time (such as television and radio) or space (newspaper or magazine pages). May also include advertising, marketing and promotional services rendered during the reporting period.

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