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Purchase of interest in Aerex Industries, Inc. (Details Textual) - USD ($)		1 Months Ended	3 Months Ended		12 Months Ended
	Feb. 11, 2016	Oct. 31, 2017	Dec. 31, 2017	Sep. 30, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Feb. 28, 2017
Business Acquisition [Line Items]
Notes Payable, Related Parties, Current			$ 686,000		$ 686,000	$ 490,000
Goodwill, Impairment Loss					1,400,000	1,750,000	$ 0
Aerex Industries Inc [Member]
Business Acquisition [Line Items]
Goodwill, Impairment Loss			$ 1,400,000	$ 1,750,000	$ 1,400,000	$ 1,750,000
Business Acquisition, Percentage of Voting Interests Acquired	51.00%
Business Combination, Consideration Transferred	$ 7,700,000
Aerex Industries Inc [Member] | Thomas Donnick, Jr [Member]
Business Acquisition [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	49.00%
Shareholders Agreement [Member]
Business Acquisition [Line Items]
Notes Payable, Related Parties, Current	$ 510,000							$ 408,000
Debt Instrument, Maturity Date	Sep. 30, 2017
Debt Instrument, Interest Rate, Stated Percentage	1.04%		1.00%		1.00%
Notes Payable, Current		$ 1,400,000
Debt Instrument, Maturity Date, Description		the term of the notes payable issued in February 2017 for an additional six months with a new maturity date of March 31, 2018.
Shareholders Agreement [Member] | Donnick [Member]
Business Acquisition [Line Items]
Notes Payable, Related Parties, Current	$ 490,000	$ 306,000
Shareholders Agreement [Member] | Former Sole Shareholder [Member]
Business Acquisition [Line Items]
Notes Payable, Related Parties, Current	$ 392,000	$ 294,000

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