Note 9 - Variable Interest Entities - Carrying Values of Assets and Liabilities of Delphax Included on the Company's Consolidated Balance Sheet (Details) - USD ($)	Dec. 31, 2017	Mar. 31, 2017		Dec. 31, 2016	Mar. 31, 2016
Cash and cash equivalents	$ 7,985,088	$ 2,763,365	[1]	$ 1,621,890	$ 5,345,455
Accounts receivable, net	16,718,738	18,923,787	[1]
Inventories	19,667,205	19,778,843	[1]
Other current assets	1,435,265	1,672,475	[1]
Total current assets	50,249,738	48,859,078	[1]
Property and equipment	18,138,660	5,324,488	[1]
Total assets	80,011,851	65,335,189	[1]
Accounts payable	9,575,439	11,571,156	[1]
Accrued expenses	8,112,945	8,672,815	[1]
Short-term Debt	2,500,000	25,000	[1]
Total current liabilities	20,188,384	20,268,971	[1]
Delphax [Member] | Reportable Legal Entities [Member]
Cash and cash equivalents	240,468	328,327
Accounts receivable, net	661,749	2,036,221
Inventories	169,048	1,941,729
Other current assets	508,980	1,145,274
Total current assets	1,580,245	5,451,551
Property and equipment		8,007
Total assets	1,580,245	5,459,558
Accounts payable	2,283,154	2,482,578
Income tax payable	11,312	11,312
Accrued expenses	3,099,812	3,627,162
Short-term Debt	2,460,670	4,714,257
Total current liabilities	7,854,948	10,835,309
Net Assets	$ (6,274,703)	$ (5,375,751)

[1] Derived from audited consolidated financial statements