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Note 3 - Income Taxes (Details Textual) | 3 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2016 USD ($) | Jun. 30, 2015 USD ($) | Nov. 24, 2015 USD ($) | Sep. 30, 2015 USD ($)
Income Tax Expense (Benefit) | $ (372,000) | $ (333,000) |  |
Effective Income Tax Rate Reconciliation, Percent | 4.40% | 34.30% |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 34.00% | 34.00% |  |
Deferred Tax Assets, Valuation Allowance | $ 12,772,000 |  | $ 11,661,000 |
Delphax [Member] | Foreign Tax Authority [Member] |  |  |  |
Operating Loss Carryforwards |  |  |  | $ 6,000,000
Tax Credit Carryforward, Amount |  |  |  | 4,500,000
Delphax [Member] | Foreign Tax Authority [Member] | Research Tax Credit Carryforward [Member] |  |  |  |
Tax Credit Carryforward, Amount |  |  |  | 4,500,000
Delphax [Member] | Domestic Tax Authority [Member] |  |  |  |
Operating Loss Carryforwards |  |  |  | 7,900,000
Tax Credit Carryforward, Amount |  |  |  | 3,200,000
Delphax [Member] | Domestic Tax Authority [Member] | Alternative Minimum Tax Credit Carryforward [Member] |  |  |  |
Tax Credit Carryforward, Amount |  |  |  | $ 325,000
Canada, France, and United Kingdom [Member] |  |  |  |
Number of Foreign Subsidiaries | 3 |  |  |
Delphax [Member] |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  | 38.00% |

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