Note 9 - Leases, Commitments and Contingencies - Future Minimum Rental Payments (Details)	Dec. 31, 2018 USD ($)
Operating leases, 2019	$ 1,077,532
Capital leases, 2019	464,797
Operating leases, 2020	1,168,710
Capital leases, 2020	354,739
Operating leases, 2021	1,203,658
Capital leases, 2021	33,774
Operating leases, 2022	1,239,885
Operating leases, 2023	1,276,356
Operating leases, Thereafter	3,818,795
Operating leases, Total minimum lease payments	9,784,936
Capital leases, Total minimum lease payments	853,310
Capital leases, Less: Interest	(24,525)
Capital leases, Present value of lease liabilities	$ 828,785

Amount of minimum lease payments for capital leases.

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Amount of minimum lease payments for capital leases due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount necessary to reduce net minimum lease payments to present value for capital leases.

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Present value of minimum lease payments for capital leases net of executory costs, including amounts paid by the lessee to the lessor for insurance, maintenance and taxes.

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Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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