Note 10 - Variable Interest Entities - Carrying Values of Assets and Liabilities of Delphax Included on the Company's Consolidated Balance Sheet (Details) - USD ($)		Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Cash and cash equivalents		$ 4,803,238	$ 2,763,365	$ 5,345,455
Accounts receivable, net	[1]	15,157,855	18,923,787
Inventories, net		34,231,005	19,778,843
Other current assets		1,455,566	1,672,475
Total current assets		61,671,108	48,859,078
Property and equipment, net		20,273,171	5,324,488
Total assets		97,146,886	65,335,189
Accounts payable		10,181,143	11,571,156
Income tax payable		23,000
Accrued expenses		11,743,973	8,672,815
Short-term Debt, Total		9,229,690	25,000
Total current liabilities		31,177,806	20,268,971
Total liabilities		70,910,863	41,728,894
Delphax [Member] | Reportable Legal Entities [Member]
Cash and cash equivalents		241,430	328,327
Accounts receivable, net		316,542	2,036,221
Inventories, net			1,941,729
Other current assets		72,269	1,145,274
Total current assets		630,241	5,451,551
Property and equipment, net			8,007
Other tax receivables-long-term		311,000
Total assets		941,241	5,459,558
Accounts payable		2,145,847	2,482,578
Income tax payable		11,312	11,312
Accrued expenses		3,244,514	3,627,162
Short-term Debt, Total		1,788,285	4,714,257
Total current liabilities		7,189,958	10,835,309
Total liabilities		7,189,958	10,835,309
Net assets		$ (6,248,717)	$ (5,375,751)

[1] Amounts related to Delphax as of March 31, 2018 and 2017, respectively.