Note 12 - Variable Interest Entities - Revenue and Expenses of Delphax Included in the Company's Consolidated Statements of Operations (Details) - USD ($)	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Revenues	$ 60,867,469	$ 47,697,373
General and administrative	8,584,803	6,584,668
Research and development		195,653
Depreciation, amortization and impairment	1,495,401	398,827
	58,263,767	45,484,805
Operating Income (Loss)	2,603,702	2,212,568
Non-operating Expenses, net	1,065,409	(608,688)
Income (Loss) Before Income Taxes	3,669,111	1,603,880
Income Tax Expense (Benefit), Total	387,000	374,000
Net Income (Loss)	3,282,111	1,229,880
Delphax [Member]
Revenues		3,131,381
Cost of sales		1,501,056
General and administrative	52,260	505,945
Research and development		195,653
Depreciation, amortization and impairment		4,691
	52,260	2,207,345
Operating Income (Loss)	(52,260)	924,036
Non-operating Expenses, net	(87,917)	(387,797)
Income (Loss) Before Income Taxes	(140,177)	536,239
Income Tax Expense (Benefit), Total
Net Income (Loss)	$ (140,177)	$ 536,239