Note 10 - Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2020

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
Year ended December 31, 2019
Number of shares		22,930		-		-		-			22,930		22,930
Weighted average exercise price per share	$	5.36		-		-		-		$	5.36	$	5.36
Year ended December 31, 2020
Number of shares		22,930		-		-		(15,930	)		7,000		7,000
Weighted average exercise price per share	$	5.36		-		-	$	4.25		$	7.90	$	7.90

	Beginning		Granted		Exercised		Canceled			Ending
	Balance		During		During		During			Balance
	Outstanding		Period		Period		Period			Outstanding		Exercisable
Year ended December 31, 2019
Number of shares		365,000		-		-		(20,000	)		345,000		285,000
Weighted average exercise price per share	$	12.35		-		-	$	11.61		$	12.33	$	12.76
Year ended December 31, 2020
Number of shares		345,000		-		-		-			345,000		305,000
Weighted average exercise price per share	$	12.33		-		-		-		$	12.33	$	12.60

	Beginning		Granted		Exercised		Canceled			Ending
	Balance		During		During		During			Balance
	Outstanding		Period		Period		Period			Outstanding		Exercisable
Year ended December 31, 2019
Number of shares		20,000		60,000		-		(15,000	)		65,000		-
Weighted average exercise price per share		-	$	5.00		-	$	5.00		$	5.94		-
Year ended December 31, 2020
Number of shares		65,000		-		-		-			65,000		-
Weighted average exercise price per share	$	5.94		-		-		-		$	5.94		-

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		45,000		.0	$	5.00	$	0		45,000	$	5.00	$	0
$7.01	-	10.00		27,000		.0	$	8.03	$	0		27,000	$	8.03	$	0
$10.01	-	12.00		220,000		.3	$	10.81	$	0		180,000	$	11.05	$	0
$12.01	-	15.00		125,000		1.5	$	15.00	$	0		125,000	$	15.00	$	0

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

				Weighted
				Average Grant
	Shares of			Date Fair
	Restricted Stock			Value
Unvested outstanding at December 31, 2018		0		$	0
Granted		37,300		$	3.99
Vested		(35,025	)	$	3.99
Forfeited/Cancelled		(2,275	)	$	3.99
Unvested outstanding at December 31, 2019		0		$	0
Granted		30,200		$	3.74
Vested		(30,200	)	$	3.74
Forfeited/Cancelled		-			-
Unvested outstanding at December 31, 2020		0		$	0

				Weighted
	Shares of			Average Grant
	Restricted			Date Fair
	Stock Units			Value
Unvested outstanding at December 31, 2018		46,063		$	8.25
Granted		10,500		$	4.15
Vested		(33,988	)	$	9.08
Forfeited/Cancelled		(-	)	$	- -
Unvested outstanding at December 31, 2019		22,575		$	4.66
Granted		-			-
Vested		(12,825	)	$	8.81
Forfeited/Cancelled		(1,000	)	$	5.45 -
Unvested outstanding at December 31, 2020		8,750		$	5.00