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Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, aircraft, airframes and aircraft parts.

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No definition available.

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Number of aircraft considered as assets held for sale.

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Amounts due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer) for goods or services (including trade receivables) that have been delivered or sold in the normal course of business.

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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.

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Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

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Cash received from sales of long-lived depreciable flight assets, including owned aircraft or capital improvements.

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No definition available.

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Assets Held for Sale (Details)	3 Months Ended		12 Months Ended
Assets Held for Sale (Details)	Mar. 31, 2019 USD ($) Aircraft	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($) Aircraft	Dec. 31, 2017 USD ($)
Aircraft and aircraft engines held for lease or sale [Abstract]
Impairment charge	$ 1,408,400	$ 0
Proceeds from the sale of airframe parts	1,079,900	1,683,500
Gain (loss) on sale of aircraft and aircraft parts	178,300	(8,200)
Held for Sale [Member] \| Turboprop Aircraft [Member]
Aircraft and aircraft engines held for lease or sale [Abstract]
Impairment charge	$ 921,000
Number of assets held for sale \| Aircraft	2
Held for Sale [Member] \| Engines [Member]
Aircraft and aircraft engines held for lease or sale [Abstract]
Impairment charge	$ 487,400
Number of assets held for sale \| Aircraft	1
Held for Sale [Member] \| Turboprop Airframe [Member]
Aircraft and aircraft engines held for lease or sale [Abstract]
Number of assets held for sale \| Aircraft	2
Held for Sale [Member] \| Aircraft [Member]
Aircraft and aircraft engines held for lease or sale [Abstract]
Number of assets held for sale \| Aircraft			3
Held for Sale [Member] \| Aircraft Parts [Member]
Aircraft and aircraft engines held for lease or sale [Abstract]
Proceeds from the sale of airframe parts	$ 216,900	931,800
Accrued receivables	$ 94,400	$ 10,600	$ 133,100	$ 779,700
Carrying value of parts sold			151,500	144,600
Gain (loss) on sale of aircraft and aircraft parts			$ 26,700	$ 18,100