Note 9 - Leases, Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Lease, Cost [Table Text Block]

		Year Ended
	Classification	December 31, 2019
Operating lease cost	General and administrative	$	884,597
Finance lease cost:
Amortization of lease assets	General and administrative		1,316,924
Interest on lease liabilities	Interest expense		190,687
Lease cost		$	2,392,208

Weighted average remaining lease term (years):
Operating leases	6.8
Finance leases	1.6
Weighted average discount rate:
Operating leases	10.3	%
Finance leases	7.7	%

Lease Liability Maturity [Table Text Block]

	Operating			Finance
Year ending December 31:	Leases			Leases			Total
2020	$	1,172,759		$	1,366,026		$	2,538,785
2021		1,207,708			814,360			2,022,068
2022		1,243,934			260,857			1,504,791
2023		1,283,253			—			1,283,253
2024		1,316,540			—			1,316,540
Thereafter		2,513,729			—			2,513,729
Total minimum lease payments		8,737,923			2,441,243			11,179,166
Less: Interest		(2,500,562	)		(140,267	)		(2,640,829	)
Present value of lease liabilities	$	6,237,361		$	2,300,976		$	8,538,337

Schedule of Future Minimum Rental Payments for Operating and Capital Leases [Table Text Block]

	Operating		Finance
	Leases		Leases
2019	$	1,077,532	$	464,797
2020		1,168,710		354,739
2021		1,203,658		33,774
2022		1,239,885		—
2023		1,276,356		—
Thereafter		3,818,795		—
Total minimum lease payments	$	9,784,936		853,310
Less: Interest				(24,525	)
Present value of lease liabilities			$	828,785