Note 7 - Employee Benefit and Savings Plan (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Defined Contribution Plan Disclosures [Table Text Block]

Year Ended December 31,	Maximum Matching Contribution per Participant *		Total Matching Contribution
20 17		$10,600		$326,612
20 16		$10,600		$277,753
20 15		$10,400		$290,388