Note 13 - Variable Interest Entities (Details Textual) - USD ($)	9 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Mar. 31, 2018
Investments in Funds, Noncurrent	$ 278,709		$ 324,854
Delphax [Member]
Percentage of Consolidated Subsidiaries Dividends Attributable to Parent	67.00%
Percentage of Consolidated Subsidiaries Dividends Attributable to Noncontrolling Interests	33.00%
Net Income (Loss) Attributable to Noncontrolling Interest, Percentage	33.00%	0.00%
Delphax [Member] \| Senior Subordinated Note [Member]
Short-term Debt, Total	$ 550,000		900,000
Delphax [Member] \| Senior Subordinated Note [Member] \| Short-term Debt [Member]
Interest Payable, Current	1,123,000		$ 888,000
Delphax [Member] \| Delphax Senior Credit Agreement [Member]
Short-term Debt, Total	0
Investment Funds Purchased from Blue Clay Capital Management, LLC [Member]
Investments in Funds, Noncurrent	$ 279,000

Amount of investments held in funds for the long-term.

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The percentage of net income (loss) attributable to non-controlling interest.

+ References

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- Definition

Represents the percentage of dividends paid by consolidated subsidiaries that attributable to noncontrolling interest.

+ References

No definition available.

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- Definition

Represents the percentage of dividends paid by consolidated subsidiaries that are attributable to parent.

+ References

No definition available.

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- Definition

Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 9
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-Section S99
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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-Name Accounting Standards Codification
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