Note 13 - Variable Interest Entities - Revenue and Expenses of Delphax Included in the Company's Consolidated Statements of Operations (Details) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues	$ 49,340,777	$ 48,861,490	$ 110,208,246	$ 96,558,863
General and administrative	9,070,053	7,276,486	17,654,856	13,861,154
Research and development				195,653
Depreciation, amortization and impairment	1,826,905	529,538	3,322,306	928,365
	50,960,778	48,385,832	109,224,545	93,870,637
Operating Income (Loss)	(1,620,001)	475,658	983,701	2,688,226
Non-operating Expenses, net	(199,989)	283,809	865,420	(324,879)
Income (Loss) Before Income Taxes	(1,819,990)	759,467	1,849,121	2,363,347
Income Tax Expense (Benefit), Total	(393,000)	281,000	(6,000)	655,000
Net Income (Loss)	$ (1,426,990)	$ 478,467	1,855,121	1,708,347
Delphax [Member]
Revenues				4,434,303
Cost of sales				2,583,807
General and administrative			222,244	1,001,896
Research and development				195,653
Depreciation, amortization and impairment				8,007
			222,244	3,789,363
Operating Income (Loss)			(222,244)	644,940
Non-operating Expenses, net			(45,782)	(188,000)
Income (Loss) Before Income Taxes			(268,026)	456,940
Income Tax Expense (Benefit), Total
Net Income (Loss)			$ (268,026)	$ 456,940