Note 15 - Acquisitions - Summary Assets Acquired and Liabilities Assumed (Details) - USD ($)	Dec. 31, 2017	Sep. 30, 2017	Jun. 01, 2017	Sep. 30, 2016	Jul. 01, 2016
Goodwill	$ 2,255,912	$ 2,255,912		$ 1,777,656
Air Enterprises [Member]
Accounts Receivable			$ 4,761,368
Inventory			594,503
Costs in excess of billings			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
Costs in excess of billings			594,545
Accrued Payroll			325,950
Accrued Expense			424,671
Lease Payable			41,533
Total Liabilities Assumed			3,113,317
Net Assets Acquired			$ 10,250,000
Federal Hose [Member]
Accounts Receivable					$ 834,720
Inventory					1,755,879
Fixed Assets					769,000
Prepaid and Other Assets					9,909
Goodwill					1,777,656
Total Assets Acquired					6,457,261
Accounts Payable					475,280
Accrued Payroll					14,725
Accrued Expense					115,725
Total Liabilities Assumed					605,730
Net Assets Acquired					5,851,531
Cash					30,097
Federal Hose [Member] | Customer Lists [Member]
Customer List					$ 1,280,000