Note 6 - Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

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

	2018	2017
Dividend yield	—	—
Expected volatility	40.0%	41.3%
Expected life of option	5	5
Risk-free interest rate	2.8%	1.8%
Fair value of each option on grant date	$3.38	$3.43

Share-based Compensation, Stock Options, Activity [Table Text Block]

				Weighted
				Average
				Exercise
	Shares			Price
Outstanding at January 1, 2018		18,168		$	13.81
Granted		2,750			8.63
Exercised		—			—
Expired and forfeited		(2,918	)		12.56
Outstanding at December 31, 2018		18,000		$	13.22
Exercisable at December 31, 2018		12,247		$	15.09