Note 9 - Variable Interest Entities - Revenue and Expenses of Delphax Included in the Company's Consolidated Statements of Operations (Details) - USD ($)	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Operating Revenues	$ 47,697,373	$ 30,493,253
General and administrative	6,585,759	5,828,946
Research and development	195,653	510,960
Depreciation, amortization and impairment	398,827	1,989,601
	45,484,805	37,566,735
Operating Income (Loss)	2,212,568	(7,073,482)
Non-operating Expenses, net	(608,688)	(1,287,898)
Income (Loss) Before Income Taxes	1,603,880	(8,361,380)
Income Tax Expense (Benefit)	374,000	(372,000)
Net Income (Loss)	1,229,880	(7,989,380)
Delphax [Member]
Operating Revenues	3,131,381	3,210,088
Cost of sales	1,501,056	6,601,734
General and administrative	505,945	1,352,152
Research and development	195,653	510,960
Depreciation, amortization and impairment	4,691	1,680,601
	2,207,345	10,145,447
Operating Income (Loss)	924,036	(6,935,359)
Non-operating Expenses, net	(387,797)	(20,940)
Income (Loss) Before Income Taxes	536,239	(6,956,299)
Income Tax Expense (Benefit)
Net Income (Loss)	$ 536,239	$ (6,956,299)