Note 2 - Liquidity and Material Agreements (Details Textual)					1 Months Ended		9 Months Ended	12 Months Ended
	Sep. 01, 2019 USD ($)	Oct. 11, 2018 USD ($)	Jan. 01, 2017	Nov. 01, 2008 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 15, 2018	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2015	Sep. 30, 2019 USD ($)	Jan. 15, 2019 USD ($)	Apr. 20, 2018 USD ($)	Mar. 15, 2018 USD ($)	Dec. 31, 2017 USD ($)	May 17, 2013 USD ($)
Cash and Cash Equivalents, at Carrying Value, Ending Balance								$ 3,597,491	$ 2,838,649						$ 1,724,504
Working Capital								3,928,872
Revenue from Contract with Customer, Including Assessed Tax								11,567,725	11,118,452
Net Income (Loss) Attributable to Parent, Total								667,644	311,536
Environmental Remediation, Agreed Percentage of Reduction in Tenant Operated Tourist Flights										20.00%
Environmental Remediation, Agreed Percentage of Reduction in Tenant Operated Tourist Flights by Year One										40.00%
Environmental Remediation, Agreed Percentage of Reduction in Tenant Operated Tourist Flights by Year Two										50.00%
Financing Receivable, after Allowance for Credit Loss, Total												$ 276,000
Financing Receivable, Interest Rate												7.50%
Financing Receivable, after Allowance for Credit Loss, Current, Total								188,828	270,000
President and Chief Executive Officer [Member]
Employment Agreement, Term	4 years
Annual Base Salary	$ 200,000
Percentage of Base Salary, Annual Incentive Bonus	25.00%
Employment Agreement, Number of Additional Stock Awards	5
Employment Agreement, Stock Awards, Percent of Issued and Outstanding Stock	0.0005%
Warren A. Peck [Member]
Proceeds from Collection of Notes Receivable					$ 100,000	$ 100,000
Financing Receivable, after Allowance for Credit Loss, Current, Total											$ 270,000
Truck Lease [Member]
Lessee, Finance Lease, Term of Contract													5 years
Capital Lease, Lessee, Purchase Price of Capital Leased Asset													$ 1
Concession Agreement [Member]
Percentage Payable Greater than Gross Receipts During Period				18.00%
Amount of Gross Receipts During Period				$ 5,000,000
Percentage Payable Greater than Gross Receipts in Year One				25.00%
Concession Fees								1,640,000	1,800,000
Line of Credit Facility, Payment Term										2 years 180 days
Line of Credit Facility, Number of Options to Extend Agreement										2
Minimum Annual Guarantee Percent			50.00%
General and Administrative Expense, Total								2,200,000	$ 1,777,000
London Interbank Offered Rate (LIBOR) [Member] | Truck Lease [Member]
Capital Leases of Lessee, Contingent Rentals, Basis Spread on Variable Rate													4.16%
Key Bank National Association [Member] | Term Loan [Member]
Debt Instrument, Face Amount														$ 338,481
PNC Bank [Member] | Term Loan [Member]
Extinguishment of Debt, Amount								280,920
Acquisition Line of Credit [Member] | Key Bank National Association [Member]
Line of Credit Facility, Maximum Borrowing Capacity														2,500,000
Debt Instrument, Term							4 years
Debt Instrument, Periodic Payment, Total								$ 0
Acquisition Line of Credit [Member] | Key Bank National Association [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate							2.75%
Acquisition Line of Credit [Member] | Key Bank National Association [Member] | Cost of Funds Rate [Member]
Debt Instrument, Basis Spread on Variable Rate								2.50%
Working Capital Line of Credit [Member] | Key Bank National Association [Member]
Line of Credit Facility, Maximum Borrowing Capacity														$ 1,000,000
Debt Instrument, Periodic Payment, Total								$ 0
Working Capital Line of Credit [Member] | Key Bank National Association [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate								2.75%
PNC Acquisition Line [Member]
Line of Credit Facility, Maximum Borrowing Capacity																$ 2,500,000
Change of Terms Agreement [Member] | Key Bank National Association [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 2,500,000
Debt Instrument, Periodic Payment, Total								$ 0
Change of Terms Agreement [Member] | Key Bank National Association [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate		4.25%