Note 11 - 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, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Delphax [Member]
United States, the Company’s country of domicile			$ 4,958,826
Cost of sales			7,723,898
General and administrative			1,704,852
Research and development			750,882
Depreciation, amortization and impairment			1,726,404
			11,906,036
Operating Loss			(6,947,210)
Non-operating Loss			(45,147)
Loss Before Income Taxes			(6,992,357)
Income Tax Expense (Benefit)
Net Loss			(6,992,357)
United States, the Company’s country of domicile	$ 38,522,990	$ 44,653,929	69,016,243	$ 67,012,449
General and administrative	5,143,446	3,658,187	10,972,392	7,465,115
Research and development	239,922	0	750,882
Depreciation, amortization and impairment	353,672	192,504	2,343,273	371,121
	37,501,251	39,149,278	75,067,986	62,556,898
Operating Loss	1,021,739	5,504,651	(6,051,743)	4,455,551
Non-operating Loss	433,075	(9,690)	(854,823)	(29,631)
Loss Before Income Taxes	1,454,814	5,494,960	(6,906,566)	4,425,920
Income Tax Expense (Benefit)	375,000	1,701,000	3,000	1,368,000
Net Loss	$ 1,079,814	$ 3,793,960	$ (6,909,566)	$ 3,057,920