Note 10 - Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2019

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, 2018
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, 2019
Number of shares		22,930		-		-		-		22,930		22,930
Weighted average exercise price per share	$	5.36		-		-		-	$	5.36	$	5.36

2007 Share Incentive Plan
	Beginning		Granted		Exercised		Canceled			Ending
	Balance		During		During		During			Balance
	Outstanding		Period		Period		Period			Outstanding		Exercisable
Year ended December 31, 2018
Number of shares		365,000		-		-		-			365,000		235,000
Weighted average exercise price per share	$	12.35		-		-		-		$	12.35	$	13.15
Year ended December 31, 2018
Number of shares		365,000		-		-		(20,000	)		345,000		285,000
Weighted average exercise price per share	$	12.35		-		-	$	11.61		$	12.69	$	12.76

2016 Share Incentive Plan
	Beginning		Granted		Exercised		Canceled			Ending
	Balance		During		During		During			Balance
	Outstanding		Period		Period		Period			Outstanding		Exercisable
Year ended December 31, 2018
Number of shares		-		20,000		-		-			20,000		-
Weighted average exercise price per share		-	$	8.07		-		-		$	8.07		-
Year ended December 31, 2019
Number of shares		20,000		60,000		-		(15,000	)		65,000		-
Weighted average exercise price per share	$	8.07	$	5.00		-	$	5.00		$	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		60,930		.1	$	4.80	$	0		15,930	$	4.25	$	0
$7.01	-	10.00		27,000		1	$	8.03	$	0		7,000	$	7.90	$	0
$10.01	-	12.00		220,000		6.3	$	10.81	$	0		160,000	$	11.05	$	0
$12.01	-	15.00		125,000		2.5	$	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, 2017		0		$	0
Granted		11,000		$	10.53
Vested		(11,000	)	$	10.53
Forfeited/Cancelled
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

				Weighted
	Shares of			Average Grant
	Restricted			Date Fair
	Stock Units			Value
Unvested outstanding at December 31, 2017		73,870		$	10.05
Granted		39,260		$	8.75
Vested		(67,067	)	$	9.26
Forfeited/Cancelled		(-	)	$	--
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