Note 11 - Variable Interest Entities - Revenue and Expenses of Delphax Included in the Company's Consolidated Statements of Operations (Details) - USD ($)	3 Months Ended								12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2019	Mar. 31, 2018
Revenues, Total	$ 76,003,000	$ 63,623,000	$ 49,341,000	$ 60,867,000	$ 53,460,000	$ 44,501,000	$ 48,861,000	$ 47,697,000	$ 249,834,478	$ 194,519,345
General and administrative									38,376,113	29,138,534
Research and development										195,653
Depreciation, amortization and impairment									7,720,574	2,678,858
									241,769,773	190,273,822
Operating (loss) income	$ 5,616,000	$ 1,465,000	$ (1,620,000)	$ 2,604,000	$ 1,005,000	$ 552,000	$ 476,000	$ 2,213,000	8,064,705	4,245,523
Non-operating expense, net									(3,362,589)	(1,593,916)
(Loss) Income before income taxes									4,702,116	2,651,607
Income tax benefit									1,502,184	195,000
Net (loss) income									3,199,932	2,456,607
Delphax [Member]
Revenues, Total										5,835,266
Cost of sales										3,261,156
General and administrative									285,180	1,399,034
Research and development										195,653
Depreciation, amortization and impairment										8,007
									285,180	4,863,850
Operating (loss) income									(285,180)	971,416
Non-operating expense, net									(218,203)	(742,120)
(Loss) Income before income taxes									(503,383)	229,296
Income tax benefit										311,000
Net (loss) income									$ (503,383)	$ 540,296