Note 9 - Variable Interest Entities (Details Textual) - USD ($)	3 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2016	Mar. 31, 2017		Nov. 24, 2016
Short-term Debt	$ 2,225,000			$ 25,000	[1]
Goodwill	$ 4,417,605			4,417,605	[1]
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	3.40%	33.00%
Delphax [Member]
Goodwill						$ 375,000
Goodwill, Impairment Loss		$ 275,000	$ 100,000
Delphax [Member] | Trade Names and Patents [Member]
Impairment of Intangible Assets, Finite-lived		1,385,000	50,000
Delphax [Member]
Severance Costs		5,610,000
Intangible Assets, Net (Including Goodwill)			$ 1,400,000
Delphax [Member] | Senior Subordinated Note [Member]
Short-term Debt	$ 3,020,000			2,889,000
Delphax [Member] | Senior Subordinated Note [Member] | Short-term Debt [Member]
Interest Payable, Current	520,000			388,000
Delphax [Member] | Delphax Senior Credit Agreement [Member]
Short-term Debt	1,541,000
Delphax [Member] | Delphax Senior Debt [Member]
Short-term Debt	215,000			$ 112,000
Delphax [Member] | Senior Subordinated Note and Delphax Senior Debt Credit Agreement [Member] | Nonoperating Income (Expense) [Member]
Interest Expense	$ 132,000	$ 55,000

[1] Derived from audited consolidated financial statements