Financing Arrangements - Long-term Debt (Details) - USD ($)	6 Months Ended
Sep. 30, 2019	Mar. 31, 2019
Debt Instrument [Line Items]
Long-term debt, gross	$ 75,697,000	$ 58,022,000
Less: Unamortized Debt Issuance Costs	(317,000)	(369,000)
Total Debt, net	75,380,000	57,653,000
AirCo
Debt Instrument [Line Items]
Long-term debt, gross	6,921,000	6,770,000
AirCo \| Revolving Loan
Debt Instrument [Line Items]
Long-term debt, gross	$ 0	3,820,000
Interest rate stated percentage	7.50%
AirCo \| Revolver - MB&T
Debt Instrument [Line Items]
Long-term debt, gross	$ 6,921,000	0
Interest rate stated percentage	6.50%
Unused commitments as of September 30, 2019	$ 3,078,000
AirCo \| Term Loan - MB&T
Debt Instrument [Line Items]
Long-term debt, gross	$ 0	450,000
Interest rate stated percentage	7.50%
AirCo \| Term Loan - MB&T, Two
Debt Instrument [Line Items]
Long-term debt, gross	$ 0	400,000
Interest rate stated percentage	7.25%
AirCo \| Term Loan - Park State
Debt Instrument [Line Items]
Long-term debt, gross	$ 0	2,100,000
Interest rate stated percentage	8.50%
Contrail Aviation Inc.
Debt Instrument [Line Items]
Long-term debt, gross	$ 26,771,000	24,117,000
Contrail Aviation Inc. \| Revolving Loan
Debt Instrument [Line Items]
Long-term debt, gross	0	0
Unused commitments as of September 30, 2019	20,000,000
Contrail Aviation Inc. \| Term Loan A
Debt Instrument [Line Items]
Long-term debt, gross	7,466,000	8,617,000
Contrail Aviation Inc. \| Term Loan B
Debt Instrument [Line Items]
Long-term debt, gross	6,500,000	15,500,000
Contrail Aviation Inc. \| Term Loan C
Debt Instrument [Line Items]
Long-term debt, gross	12,805,000	0
Parent Company
Debt Instrument [Line Items]
Long-term debt, gross	42,005,000	27,135,000
Parent Company \| Revolving Loan
Debt Instrument [Line Items]
Long-term debt, gross	$ 18,424,000	12,403,000
Maturity Date	Nov. 30, 2019
Unused commitments as of September 30, 2019	$ 1,576,000
Parent Company \| Term Note A - MB&T
Debt Instrument [Line Items]
Long-term debt, gross	$ 8,250,000	8,750,000
Maturity Date	Jan. 01, 2028
Parent Company \| Term Note B - MB&T
Debt Instrument [Line Items]
Long-term debt, gross	$ 4,125,000	4,375,000
Maturity Date	Jan. 01, 2028
Interest rate stated percentage	4.50%
Parent Company \| Term Note D - MB&T
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,574,000	1,607,000
Maturity Date	Jan. 01, 2028
Parent Company \| Debt - Trust Preferred Securities
Debt Instrument [Line Items]
Long-term debt, gross	$ 9,632,243	$ 0
Interest rate stated percentage	8.00%
Prime Rate \| AirCo \| Revolver - MB&T
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
Prime Rate \| Parent Company \| Revolving Loan
Debt Instrument [Line Items]
Interest rate stated percentage	1.00%
London Interbank Offered Rate (LIBOR) \| Contrail Aviation Inc. \| Revolving Loan
Debt Instrument [Line Items]
Basis spread on variable rate	3.00%
London Interbank Offered Rate (LIBOR) \| Contrail Aviation Inc. \| Term Loan A
Debt Instrument [Line Items]
Basis spread on variable rate	3.75%
London Interbank Offered Rate (LIBOR) \| Contrail Aviation Inc. \| Term Loan B
Debt Instrument [Line Items]
Basis spread on variable rate	3.75%
London Interbank Offered Rate (LIBOR) \| Contrail Aviation Inc. \| Term Loan C
Debt Instrument [Line Items]
Basis spread on variable rate	3.75%
London Interbank Offered Rate (LIBOR) \| Parent Company \| Term Note A - MB&T
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
London Interbank Offered Rate (LIBOR) \| Parent Company \| Term Note D - MB&T
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Amount of unamortized debt discount (premium) and debt issuance costs.

+ References

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- Definition

Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

+ References

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 470
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