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Summary of Significant Accounting Policies (Details)	3 Months Ended		9 Months Ended
	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) segment item	Jun. 30, 2017 USD ($)
Number of business segments
Number of business segments in which the entity operates | segment			1
Depreciation	$ 105,000	$ 111,000	$ 314,000	$ 330,000
Long-Lived Assets
Impairment charges			$ 0	0
Revenue Recognition
Minimum number of deliverable for allocating revenue to each deliverable | item			1
Engineering Development
Percentage of employees who were engineers engaged in various engineering development projects			27.00%
Warranty
Length of warranty period			24 months
Customer Service
Customer Service Revenue
Customer Service Sales	1,000,436	827,046	$ 3,224,743	2,228,934
Customer Service Cost of Sales	463,513	367,697	1,465,091	1,001,046
Gross Profit	536,923	$ 459,349	$ 1,759,652	$ 1,227,888
Property and equipment except manufacturing facility and the corporate airplane | Minimum
Number of business segments
Estimated useful lives			3 years
Property and equipment except manufacturing facility and the corporate airplane | Maximum
Number of business segments
Estimated useful lives			7 years
Manufacturing facility
Number of business segments
Estimated useful lives			39 years
Corporate airplanes
Number of business segments
Estimated useful lives			10 years
Purchase of aircraft	$ 2,400,000

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