Note 4 - Deferred Rent - Summary of Deferred Rent (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Landlord-funded leasehold improvements	$ 1,124,790	$ 1,124,790
Less accumulated amortization	(661,274)	(629,525)
Total	463,516	495,265
Straight line rent adjustment	124,218	127,158
Total deferred rent	$ 587,734	$ 622,423