Note 12 - Lease Arrangements (Details Textual)		12 Months Ended
	Aug. 01, 2017 CAD ($) ft²	Mar. 31, 2018 USD ($) ft² a	Mar. 31, 2017 USD ($)	Aug. 01, 2017 a
Operating Leases, Rent Expense, Total | $		$ 4,520,000	$ 3,872,000
Delphax [Member]
Operating Leases, Rent Expense, Total | $		$ 95,000	$ 391,000
Kinston, North Carolina [Member]
Area of Lease Facility | ft²		53,000
Area of Total Facility | ft²		66,000
Number of Additional Lease Option Periods		4
Lessee, Operating Lease, Renewal Term		5 years
Office Space at Ford Airport in Iron Mountain, Michigan [Member]
Area of Lease Facility | ft²		1,950
Hangar Space at Ford Airport in Iron Mountain, Michigan [Member]
Area of Lease Facility | ft²		4,800
GGS Leases [Member]
Area of Lease Facility | ft²		112,500
GAS Leases [Member]
Lessee, Operating Lease, Renewal Term		1 year
Verona, Wisconsin Facility Lease [Member] | Contrail Aviation Inc. [Member]
Operating Leases Monthly Rent | $		$ 13,000
Area of Lease Facility | ft²		21,000
Lessee, Operating Lease, Renewal Term		5 years
Lease Contract with Pinal Country, Arizona [Member] | Global Aviation Partners LLC [Member] | Jet Yard, LLC [Member]
Area of Lease Facility | a		2.6
Area of Total Facility | a		48.5
Lessee, Operating Lease, Renewal Term		30 years
Operating Lease, Lessee, Annual Rent Increase, Incremental Period			3 years
Manufacturing facility in Mississauga, Ontario [Member]
Area of Lease Facility | ft²		76,734
Building Lease in Ontario [Member]
Area of Real Estate Property	12,206			12,206
Operating Lease, Lessee, Initial Annual Rent, Amount | $	$ 94,600
Operating Lease, Lessee, Annual Rent, After Annual Increments, Amount | $	$ 97,000
Facility from Shareholder of AirCo Seller [Member]
Area of Lease Facility | ft²		20,000
Operating Leases, Rent Expense, Total | $		$ 121,000
Company Controlled by Company's Officer and Directors [Member]
Operating Leases Monthly Rent | $			$ 14,862
Related Party [Member]
Operating Leases, Rent Expense, Total | $		$ 337,000	$ 289,000