Note 12 - Financing Arrangements - Long-term Debt (Details) - USD ($)	6 Months Ended
Sep. 30, 2018	Mar. 31, 2018
Long-term debt, gross	$ 59,770,173	$ 48,450,238
Less: Unamortized Debt Issuance Costs	(404,638)	(365,288)
Total Debt, net	59,365,535	48,084,950
Parent Company [Member]
Long-term debt, gross	22,487,933	16,299,400
AirCo [Member]
Long-term debt, gross	5,716,775	7,404,775
Contrail Aviation Inc. [Member]
Long-term debt, gross	27,515,465	24,746,062
Worthington Aviation Parts, Inc [Member]
Long-term debt, gross	4,050,000
Revolving Loan [Member] \| Parent Company [Member]
Long-term debt, gross	$ 6,972,133
Maturity Date	Nov. 30, 2019
Revolving Loan [Member] \| AirCo [Member]
Long-term debt, gross	$ 5,000,000	5,000,000
Maturity Date	Feb. 21, 2019
Revolving Loan [Member] \| Contrail Aviation Inc. [Member]
Long-term debt, gross		14,826,062
Maturity Date	May 05, 2019
Revolving Loan [Member] \| Worthington Aviation Parts, Inc [Member]
Long-term debt, gross	$ 650,000
Maturity Date	Nov. 30, 2019
Term Loan A [Member] \| Parent Company [Member]
Long-term debt, gross	$ 9,250,000	9,750,000
Maturity Date	Jan. 01, 2028
Term Loan B [Member] \| Parent Company [Member]
Long-term debt, gross	$ 4,625,000	4,875,000
Maturity Date	Jan. 01, 2028
Term Loan D [Member] \| Parent Company [Member]
Long-term debt, gross	$ 1,640,800	1,674,400
Maturity Date	Jan. 01, 2028
Term Loan [Member] \| AirCo [Member]
Long-term debt, gross	$ 716,775	2,404,775
Maturity Date	Mar. 26, 2019
Term Loan [Member] \| Contrail Aviation Inc. [Member]
Long-term debt, gross	$ 9,515,465	9,920,000
Maturity Date	Jan. 26, 2021
Term Loan [Member] \| Worthington Aviation Parts, Inc [Member]
Long-term debt, gross	$ 3,400,000
Maturity Date	Nov. 30, 2019
Term Loan, Two [Member] \| Contrail Aviation Inc. [Member]
Long-term debt, gross	$ 18,000,000
Maturity Date	Sep. 14, 2021

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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