Fair Value Measurements (Details)	12 Months Ended
Dec. 31, 2018 USD ($) Aircraft	Dec. 31, 2017 USD ($) Aircraft
Finance Leases [Abstract]
Impairment charge	$ 2,971,500	$ 1,002,100
Level 3 [Member] \| UK LLC SPE Financing [Member]
Finance Leases [Abstract]
Principal and accrued interest	9,227,200	13,535,300
Level 3 [Member] \| Credit Facility [Member]
Finance Leases [Abstract]
Principal and accrued interest	122,539,300	134,278,900
Recurring [Member]
Liabilities, Fair Value Disclosure [Abstract]
Liabilities at fair value	0	0
Recurring [Member] \| Money Market Funds [Member]
Assets, Fair Value Disclosure [Abstract]
Assets at fair value	656,400	6,151,900
Recurring [Member] \| Level 1 [Member] \| Money Market Funds [Member]
Assets, Fair Value Disclosure [Abstract]
Assets at fair value	656,400	6,151,900
Recurring [Member] \| Level 2 [Member] \| Money Market Funds [Member]
Assets, Fair Value Disclosure [Abstract]
Assets at fair value	0	0
Recurring [Member] \| Level 3 [Member] \| Money Market Funds [Member]
Assets, Fair Value Disclosure [Abstract]
Assets at fair value	0	0
Nonrecurring [Member] \| Level 3 [Member] \| Held for Lease [Member] \| Aircraft [Member]
Finance Leases [Abstract]
Impairment charge	$ 298,200	$ 1,002,100
Number of assets held for lease \| Aircraft	1	5
Nonrecurring [Member] \| Level 3 [Member] \| Held for Sale [Member] \| Aircraft [Member]
Assets, Fair Value Disclosure [Abstract]
Assets at fair value	$ 9,900,000
Finance Leases [Abstract]
Impairment charge	$ 2,673,300
Number of assets held for sale \| Aircraft	4

Refers to number of aircraft held for lease classified as finance leases.

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- Definition

Refers to number of assets held for sale.

+ References

No definition available.

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- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228

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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258

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- Definition

Fair value of financial and nonfinancial obligations.

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- Definition

Fair value of the amount outstanding under the credit facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

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