Note 6 - Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	2019		2018
Dividend yield	—		—
Expected volatility	37.5	%	40.0	%
Expected life of option (years)	5		5
Risk-free interest rate	1.7	%	2.8	%
Fair value of each option on grant date	$2.53		$3.38

Share-based Payment Arrangement, Option, Activity [Table Text Block]

				Weighted
				Average
				Exercise
	Shares			Price
Outstanding at January 1, 2019		18,000		$	13.22
Granted		3,250			7.15
Exercised		—			—
Expired and forfeited		(2,000	)		21.69
Outstanding at December 31, 2019		19,250		$	11.32
Exercisable at December 31, 2019		13,415		$	12.83