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Note 8 - Stock-based Compensation Expense (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

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

2001 Non-Qualified Stock Option Plan
		Beginning				Granted				Exercised				Canceled				Ending
		Balance				During				During				During				Balance
		Outstanding				Period				Period				Period				Outstanding				Exercisable
Number of shares			7,000				-				-				(7,000	)			-				-
Weighted average exercise price per share		$	7.90				-				-			$	7.90				-				-
2007 Share Incentive Plan
		Beginning				Granted				Exercised				Canceled				Ending
		Balance				During				During				During				Balance
		Outstanding				Period				Period				Period				Outstanding				Exercisable
Number of shares			345,000				-				-				-				345,000				325,000
Weighted average exercise price per share		$	12.33				-				-				-			$	12.33			$	12.46
2016 Share Incentive Plan
		Beginning				Granted				Exercised				Canceled				Ending
		Balance				During				During				During				Balance
		Outstanding				Period				Period				Period				Outstanding				Exercisable
Number of shares			65,000				328,500				-				-				393,500				65,000
Weighted average exercise price per share		$	5.94			$	4.13				-				-			$	4.43			$	5.94

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

		June 2021 Grant				3rd quarter 2021 Grant
		150,000 Stock Options				178,500 Stock Options
Stock Price		$	4.26			$	4.01
Exercise Price		$	4.26			$	4.01
Dividend yield			0	%			0	%
Expected volatility			67	%			67	%
Risk-Free interest rate			1.35	%			1.35	%
Expected life (in years)			6.00				6.00

Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block]

						Options Outstanding																Options Exercisable
										Weighted				Weighted												Weighted
										Average				Average												Average
Exercise						Number				Remaining				Exercise				Intrinsic				Number				Exercise				Intrinsic
Price Range						Outstanding				Contractual				Price				Value				Exercisable				Price				Value
$	4.00	-	7.00				373,500				9.6			$	4.13			$	149,000				45,000			$	5.00			$	0
$	7.01	-	10.00				20,000				6.6			$	8.07			$	0				20,000			$	8.07			$	0
$	10.01	-	12.00				220,000				2.1			$	10.81			$	0				200,000			$	10.87			$	0
$	12.01	-	15.00				125,000				.7			$	15.00			$	0				125,000			$	15.00			$	0

Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

		Shares of Restricted Stock				Weighted Average Grant Date Fair Value
Unvested outstanding at December 31, 2020			-				-
Granted			42,800			$	4.65
Vested			-				-
Forfeited/Cancelled			(7,646	)		$	4.90
Unvested outstanding at September 30, 2021			35,154			$	4.59

						Weighted
		Shares of				Average Grant
		Restricted				Date Fair
		Stock Units				Value
Unvested outstanding at December 31, 2020			8,750			$	5.00
Granted			2,333			$	5.36
Vested			(5,583	)		$	5.32
Forfeited/Cancelled			-			$	- -
Unvested outstanding at September 30, 2021			5,500			$	4.83

X

- Definition

Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

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