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Note 17 - Income Taxes (Details Textual) | 12 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2017 USD ($) | Mar. 31, 2016 USD ($) | Sep. 30, 2016 USD ($) | Nov. 24, 2015
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 34.00% | 34.00% |  |
Deferred Tax Assets, Valuation Allowance | $ 14,698,000 | $ 10,830,000 |  |
Unrecognized Tax Benefits | 0 | 0 |  |
Estimated Future Liquidation Loss on Tax Attributes | $ 2,900,000 |  |  |
Canada, France, and United Kingdom [Member] |  |  |  |
Number of Foreign Subsidiaries | 3 |  |  |
Delphax [Member] |  |  |  |
Deferred Tax Assets, Valuation Allowance | $ 3,212,000 | $ 557,000 |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  | 38.00%
Delphax [Member] | Foreign Tax Authority [Member] |  |  |  |
Operating Loss Carryforwards |  |  | $ 6,300,000 |
Delphax [Member] | Domestic Tax Authority [Member] |  |  |  |
Operating Loss Carryforwards |  |  | 13,200,000 |
Delphax [Member] | Domestic Tax Authority [Member] | Research Tax Credit Carryforward [Member] |  |  |  |
Tax Credit Carryforward, Amount |  |  | 4,300,000 |
Delphax [Member] | Domestic Tax Authority [Member] | Alternative Minimum Tax Credit Carryforward [Member] |  |  |  |
Tax Credit Carryforward, Amount |  |  | $ 311,000 |

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