Note 7 - Commitments (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Lease, Cost [Table Text Block]

	Year ended December 31, 2019
Rent expense for long-term operating leases	$	116,963
Rent expense for short-term leases		99,240
Total rent expense	$	216,203

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

Year	Amount
2020	$	141,976
2021		144,976
2022		110,967
Total lease payments		397,919
Less: Interest		(26,631	)
Net present value of lease liabilities	$	371,288

Operating Lease, Weighted Average Remaining Lease Terms and Discount Rates [Table Text Block]

Weighted average lease term (in months)	33
Weighted average discount rate	4.89	%