Note 4 - Deferred Rent - Summary of Deferred Rent (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Landlord-funded leasehold improvements	$ 1,124,790	$ 1,124,790
Less accumulated amortization	(724,773)	(629,525)
Total	400,017	495,265
Straight line rent adjustment	116,312	127,158
Total deferred rent	$ 516,329	$ 622,423