Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Period Type:	duration

Note 10 - Acquisitions (Details Textual)	Jul. 05, 2018 USD ($)	Jul. 01, 2018 USD ($)	Jun. 01, 2017 USD ($)
Air Enterprises [Member]
Number of States in which Entity Operates			1
CAD Enterprises, Inc. [Member]
Business Combination, Consideration Transferred, Total	$ 21,000,000	$ 21,000,000
Payments to Acquire Businesses, Gross	$ 12,000,000	$ 12,000,000
Air Enterprises [Member]
Business Combination, Consideration Transferred, Total			$ 10,250,000