Note 10 - Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

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

				Weighted
				Average
				Exercise Price
	Shares			Per Option
Options outstanding, December 31, 2018		1,022,913		$	2.69
Granted to employees and directors		370,000			3.59
Exercised		(66,499	)		1.96
Canceled/expired/forfeited		-			-
Options outstanding, December 31, 2019		1,326,414			2.86
Granted to employees and directors		-			-
Exercised		(757,674	)		2.64
Canceled/expired/forfeited		-			-
Options outstanding, December 31, 2020		568,740			3.37
Options exercisable, December 31, 2020		200,500			3.48

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

	Stock Options
	For the Years Ended December 31,
	2020		2019
Exercise price		-	$	3.59
Risk-free interest rate		-		2.23	%
Expected volatility		-		32.17	%
Expected life in years		-		4.25
Black-Scholes fair value		-	$	1.06

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

			Options Outstanding								Options Exercisable
Range of Exercise Prices			Options		Weighted Average Exercise Price		Weighted Average Remaining Contract Life (in years)		Aggregate Intrinsic Value		Options		Weighted Average Exercise Price		Weighted Average Remaining Contract Life (in years)		Aggregate Intrinsic Value
$1.58	-	$3.90		568,710	$	3.37		2.84	$	4,473,000		200,500	$	3.48		2.63	$	1,601,000