Note 10 - Acquisitions - Summary Assets Acquired and Liabilities Assumed (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017	Jun. 01, 2017
Goodwill	$ 2,255,912	$ 2,255,912
Air Enterprises [Member]
Accounts Receivable			$ 4,761,368
Inventory			594,503
Costs in excess of billings and estimated costs			3,980,824
Fixed Assets			2,112,120
Prepaid and Other Assets			53,110
Intangibles Assets			1,230,000
Goodwill			631,392
Total Assets Acquired			13,363,317
Accounts Payable			1,726,618
Billings in Excess of costs and earnings			594,545
Accrued Payroll and related expenses			325,950
Accrued Expense			424,671
Lease Payable			41,533
Total Liabilities Assumed			3,113,317
Net Assets Acquired			$ 10,250,000