Note 9 - Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	2018
	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
Financial Assets:
Available-for-Sale Debt Securities –
U.S. Treasury Bills Maturing in 2019	$	---	$	16,249,414	$	---
Equity Securities –
Domestic Equities		259,843		---		---
International Equities		179,083		---		---
Others		15,132		---		---

	2017
	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
Financial Assets:
Available-for-Sale Debt Securities –
U.S. Treasury Bills Maturing in 2018	$	---	$	16,371,544	$	---
Equity Securities –
Domestic Equities		249,210		---		---
International Equities		271,921		---		---
Others		38,805		---		---