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Note 8 - Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2018

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

	2018					2017
	Options			Weighted Avg. Exercise Price		Options			Weighted Avg. Exercise Price
Outstanding beginning of the year		140,424		$	7.85		236,844		$	$8.14
Granted		-					-
Exercised		-					-
Expired and forfeited		(58,998	)		7.96		(96,420	)		8.57
Outstanding at end of year		81,426		$	7.77		140,424		$	7.85

Exercisable at end of year		14,655		$	7.77		13,713		$	7.77

Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]

	2018					2017
	Warrants			Weighted Avg. Exercise Price		Warrants			Weighted Avg. Exercise Price

Outstanding beginning of the year		5,960		$	4.46		6,291		$	5.34
Granted		1,113			4.24		1,258			4.77
Exercised		-					-
Expired		(2,183	)		4.06		(1,589	)		8.19
Outstanding at end of year		4,890		$	4.58		5,960		$	4.46

Exercisable at end of year		4,890					5,960

Schedule of Stockholders' Equity Note, Warrants and Rights Outstanding and Exercisable [Table Text Block]

			As of December 31, 2018
			Warrants Outstanding and Exercisable
Range of Exercise Prices			Warrants		Weighted Avg. Exercise Price		Weighted Avg. Remaining Life
	$4.24			1,113	$	4.24		3.00
	$4.64			2,519		4.64		1.00
	$4.77			1,258		4.77		2.00
$4.24	-	$4.77		4,890	$	4.58		1.71

Warrants [Member]

Notes Tables

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

	Year ended December 31
	2018			2017

Expected warrant life (years)		3.0			3.0
Risk-free weighted average interest rate		2.46	%		1.98	%
Stock price volatility		55.8	%		73.8	%
Dividend yield		0.0	%		0.0	%

- Definition

Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable.

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