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Note 2 - Summary of Significant Accounting Policies (Details) (USD $) | 12 Months Ended | 3 Months Ended | 12 Months Ended |  | 12 Months Ended |  |  |  | 0 Months Ended | 10 Months Ended | 12 Months Ended | 0 Months Ended | 1 Months Ended | 12 Months Ended
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Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 Daily Journal Non-Consolidated [Member] | Sep. 30, 2012 Daily Journal Non-Consolidated [Member] | Sep. 30, 2013 Sustain Technologies, Inc. [Member] | Sep. 30, 2012 Sustain Technologies, Inc. [Member] | Sep. 30, 2013 Daily Journal Consolidated [Member] | Sep. 30, 2012 Daily Journal Consolidated [Member] | Sep. 30, 2013 Net of Taxes [Member] | Sep. 30, 2012 Net of Taxes [Member] | Sep. 30, 2013 Fair Value Adjustment Due to Goodwill Impairment [Member] New Dawn [Member] | Sep. 30, 2013 Building and Building Improvements [Member] Minimum [Member] | Sep. 30, 2013 Building and Building Improvements [Member] Maximum [Member] | Sep. 30, 2013 Furniture, Office Equipment, and Software [Member] Minimum [Member] | Sep. 30, 2013 Furniture, Office Equipment, and Software [Member] Maximum [Member] | Sep. 30, 2013 Machinery and Equipment [Member] Minimum [Member] | Sep. 30, 2013 Machinery and Equipment [Member] Maximum [Member] | Dec. 04, 2012 Deferred Maintenance Agreement [Member] Preliminary Allocated Purchase Price [Member] ISD [Member] | Dec. 04, 2012 Deferred Maintenance Agreement [Member] New Dawn [Member] | Dec. 04, 2012 Deferred Installation Contracts [Member] New Dawn [Member] | Dec. 04, 2012 Claims by Customers [Member] New Dawn [Member] | Sep. 30, 2013 Management Incentive Plan, Future Commitment [Member] | Sep. 30, 2013 Product Concentration Risk [Member] Sales [Member] | Dec. 04, 2012 Preliminary Allocated Purchase Price [Member] ISD [Member] Purchased Software and Customer Relationship [Member] | Dec. 04, 2012 Preliminary Allocated Purchase Price [Member] ISD [Member] | Sep. 30, 2013 New Dawn [Member] Purchased Software and Customer Relationship [Member] | Dec. 04, 2012 New Dawn [Member] Purchased Software and Customer Relationship [Member] | Dec. 04, 2012 New Dawn [Member] | Sep. 30, 2013 New Dawn [Member] | Sep. 30, 2013 New Dawn [Member] | Sep. 30, 2013 ISD [Member] Purchased Software and Customer Relationship [Member] | Sep. 13, 2013 ISD [Member] | Sep. 30, 2013 ISD [Member] | Sep. 30, 2013 ISD [Member] | Sep. 30, 2013 Purchased Software and Customer Relationship [Member] | Sep. 30, 2013 Minimum [Member] | Sep. 30, 2013 Maximum [Member]
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities | $ 136,994,000 | $ 102,956,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Gross Unrealized Gain (Loss) | 89,018,000 | 52,464,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Tax Liabilities, Investments | 34,610,000 | 20,898,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Gross Unrealized Gain |  | 54,653,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale Securities, Gross Unrealized Loss |  | 2,189,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net | 1,719,000 | 2,855,000 |  |  |  |  |  |  | 1,051,000 | 1,720,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 14,000,000 |  |  |  | 16,000,000 |  |  |  |  |
Business Acquisition, Transaction Costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 96,000 |  |  |  | 202,000 |  |  |  |  |
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,403,000 |  |  |  | 784,000 | 784,000 |  |  |
Business Combination Pro Forma Information Expenses Since Acquisition Date Actual |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,625,000 |  |  |  | 694,000 | 694,000 |  |  |
Amortization of Intangible Assets | 1,865,000 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,587,000 |  |  |  | 278,000 | 278,000 |  |  |
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 222,000 |  |  |  | 90,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,410,000 |  |  | 4,805,000 |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,546,000 |  |  | 2,122,000 |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 87,000 |  |  | 1,881,000 |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,636,000 |  |  | 660,000 |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 141,000 |  |  | 142,000 |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 16,702,000 |  |  | 9,500,000 |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,090,000 |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,100,000 |  |  |  | 2,270,000 |  |  | 2,334,000 |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,842,000 | 2,200,000 | 7,472,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill | 11,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,700,000 |  |  |  |  |  |  |  |  |
Goodwill Amortization Period for Tax Purposes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15 years |  |  |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years | 15 years |  |  |  |  |  |
Increase (Decrease) in Prepaid Expense and Other Assets | (252,000) | 9,000 |  |  |  |  |  |  |  |  | 1,760,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Accrued Liabilities | (3,016,000) | (1,415,000) |  |  |  |  |  |  |  |  | (540,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill, Impairment Loss |  |  |  |  |  |  |  |  |  |  | (2,300,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,112,000 |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Pro Forma Information, Disclosure Impracticable, Interest Expense | 133,000 | 221,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Pro Forma Information, Disclosure Impracticable, Intangible Amortization | 3,370,000 | 5,235,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,913,000 |  |  |  |  | 16,424,000 |  |  |  |  |  |
Finite-Lived Intangible Assets, Accumulated Amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,587,000 |  |  |  |  | 278,000 |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months | 5,235,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Two | 5,235,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Three | 5,235,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Four | 5,235,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Five | 3,397,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  |  |  |  |  |  |  |  |  |  | 5 years | 39 years | 3 years | 5 years | 3 years | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 years | 39 years
Depreciation, Depletion and Amortization | 2,441,000 | 503,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 37.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Management Incentive Plan Total Percentage Of Pre Tax Earnings |  |  | 3.66% | 3.60% | 7.95% | 8.23% | 8.20% | 8.20% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Management Incentive Plan Total Amount Paid |  |  | 351,120 | 513,500 | 0 | 0 | 241,240 | 701,520 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Accrued Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,620,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Other Accrued Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (1,610,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Accrued Liabilities, Impact On Earnings Per Share (in Dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (0.92) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted Average Number of Shares Outstanding, Basic and Diluted (in Shares) | 1,380,746 | 1,380,746 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Represents total amount paid to all participants of a specific type of incentive certificate under the DJC Management Incentive Plan. + References No definition available. + Details
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- Definition Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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- Definition Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition. + References No definition available. + Details
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- Definition This element represents the amount of earnings or loss 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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