Note 2 - Restated Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (Details) (USD $)	3 Months Ended	9 Months Ended
Jun. 30, 2014	Jun. 30, 2014
Revenues
Advertising	$ 2,976,000us-gaap_AdvertisingRevenue	$ 8,620,000us-gaap_AdvertisingRevenue
Circulation	1,502,000us-gaap_SubscriptionRevenue	4,518,000us-gaap_SubscriptionRevenue
Advertising service fees and other	771,000us-gaap_OtherSalesRevenueNet	2,108,000us-gaap_OtherSalesRevenueNet
Information systems and services	5,898,000us-gaap_TechnologyServicesRevenue	16,680,000us-gaap_TechnologyServicesRevenue
	11,147,000us-gaap_Revenues	31,926,000us-gaap_Revenues
Costs and expenses
Salaries and employee benefits	6,175,000us-gaap_LaborAndRelatedExpense	19,032,000us-gaap_LaborAndRelatedExpense
Other outside services	822,000djco_OtherOutsideServices	2,409,000djco_OtherOutsideServices
Postage and delivery expenses	335,000djco_PostageAndHandDelivery	961,000djco_PostageAndHandDelivery
Newsprint and printing expenses	368,000djco_NewsprintAndContractPrintings	948,000djco_NewsprintAndContractPrintings
Depreciation and amortization	1,385,000us-gaap_DepreciationAndAmortization	4,134,000us-gaap_DepreciationAndAmortization
Other general and administrative expenses	2,325,000us-gaap_OperatingExpenses	6,492,000us-gaap_OperatingExpenses
	11,410,000	33,976,000
Loss from operations	(263,000)us-gaap_OperatingIncomeLoss	(2,050,000)us-gaap_OperatingIncomeLoss
Other income (expense)
Dividends and interest income	824,000	2,100,000
Other income	26,000us-gaap_OtherNonoperatingIncomeExpense	77,000us-gaap_OtherNonoperatingIncomeExpense
Interest and penalty expenses accrued for uncertain and unrecognized tax benefits	(518,000)	(518,000)
Interest expense	(56,000)us-gaap_InterestExpense	(173,000)us-gaap_InterestExpense
Income (loss) before taxes	13,000	(564,000)
Provision for (benefit from) income taxes	(25,000)us-gaap_IncomeTaxExpenseBenefit	(15,000)us-gaap_IncomeTaxExpenseBenefit
Net income	38,000us-gaap_NetIncomeLoss	(549,000)us-gaap_NetIncomeLoss
Weighted average number of common shares outstanding - basic and diluted (in shares)	1,380,746	1,380,746
Basic and diluted net income per share (in dollars per share)	$ 0.03us-gaap_EarningsPerShareBasicAndDiluted	$ (0.40)us-gaap_EarningsPerShareBasicAndDiluted
Comprehensive (loss) income
Net income	38,000us-gaap_NetIncomeLoss	(549,000)us-gaap_NetIncomeLoss
Net change in unrealized appreciation of investments (net of taxes)	(689,000)	18,177,000
	(651,000)us-gaap_ComprehensiveIncomeNetOfTax	17,628,000us-gaap_ComprehensiveIncomeNetOfTax
Restatement Adjustment [Member]
Other income (expense)
Interest and penalty expenses accrued for uncertain and unrecognized tax benefits	(518,000)	(518,000)
Income (loss) before taxes	(518,000)	(518,000)
Provision for (benefit from) income taxes	2,285,000	2,285,000
Net income	(2,803,000)	(2,803,000)
Basic and diluted net income per share (in dollars per share)	$ (2.03)	$ (2.03)
Comprehensive (loss) income
Net income	(2,803,000)	(2,803,000)
	(2,803,000)	(2,803,000)
Scenario, Previously Reported [Member]
Revenues
Advertising	2,976,000	8,620,000
Circulation	1,502,000	4,518,000
Advertising service fees and other	771,000	2,108,000
Information systems and services	5,898,000	16,680,000
	11,147,000	31,926,000
Costs and expenses
Salaries and employee benefits	6,175,000	19,032,000
Other outside services	822,000	2,409,000
Postage and delivery expenses	335,000	961,000
Newsprint and printing expenses	368,000	948,000
Depreciation and amortization	1,385,000	4,134,000
Other general and administrative expenses	2,325,000	6,492,000
	11,410,000	33,976,000
Loss from operations	(263,000)	(2,050,000)
Other income (expense)
Dividends and interest income	824,000	2,100,000
Other income	26,000	77,000
Interest expense	(56,000)	(173,000)
Income (loss) before taxes	531,000	(46,000)
Provision for (benefit from) income taxes	(2,310,000)	(2,300,000)
Net income	2,841,000	2,254,000
Weighted average number of common shares outstanding - basic and diluted (in shares)	1,380,746	1,380,746
Basic and diluted net income per share (in dollars per share)	$ 2.06	$ 1.63
Comprehensive (loss) income
Net income	2,841,000	2,254,000
Net change in unrealized appreciation of investments (net of taxes)	(689,000)	18,177,000
	$ 2,152,000	$ 20,431,000

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