Note 11 - Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2015

Notes Tables

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

	Beginning Balance Outstanding		Granted During Period		Exercised During Period		Canceled During Period		Ending Balance Outstanding		Exercisable
Year ended December 31, 2014
Number of shares		35,250		-0-		-0-		0		35,250		35,250
Weighted average exercise price
Per share	$	4.62		-0-		-0-		-0-	$	4.62	$	4.62
Year ended December 31, 2015
Number of shares		35,250		-0-		-0-		-0-		35,250		35,250
Weighted average exercise price
Per share	$	4.62		-0-		-0-		-0-	$	4.62	$	4.62

	Beginning Balance Outstanding		Granted During Period		Exercised During Period		Canceled During Period		Ending Balance Outstanding		Exercisable
Year ended December 31, 2014
Number of shares		152,480		-0-		28,000		-0-		124,480		111,980
Weighted average exercise price
Per share	$	4.35		-0-		-0-		-0-	$	4.57	$	4.56
Year ended December 31, 2015
Number of shares		124,480		-0-		-0-		-0-		124,480		111,980
Weighted average exercise price
Per share	$	4.35		-0-		-0-		-0-	$	4.57	$	4.56

	Beginning Balance Outstanding		Granted During Period		Exercised During Period		Canceled During Period		Ending Balance Outstanding		Exercisable
Year ended December 31, 2014
Number of shares		-0-		100,000		-0-		-0-		100,000		-0-
Weighted average exercise price
Per share	$	11.17
Year ended December 31, 2015
Number of shares		100,000		-0-		-0-		-0-		100,000		-0-
Weighted average exercise price
Per share									$	11.17

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

				Options Outstanding								Options Exercisable
Exercise Price Range				Number Outstanding		Weighted Average Remaining Contractual		Weighted Average Exercise Price		Intrinsic Value		Number Exercisable		Weighted Average Exercise Price		Intrinsic Value
$	3.00	-	3.99		34,000		2.95	$	3.65	$	218,620		34,000	$	3.65	$	218,620
$	4.00	-	4.49		15,930		5.04	$	4.25	$	92,872		15,930	$	4.25	$	92,872
$	4.50	-	4.99		100,000		2.78	$	4.62	$	546,000		75,000	$	4.62	$	546,000
$	5.00	-	7.99		9,800		6.04	$	7.90	$	21,364		9,800	$	7.90	$	21,364
$	8.00	-	12.00		100,000		9.80	$	11.17	$	0		0	$	11.17	$	0

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

	Shares of Restricted Stock			Weighted Average Grant Date Fair Value
Unvested outstanding at January 1, 2014		12,000		$	10.97
Granted		6,400		$	14.24
Vested		(10,400	)	$	12.98
Forfeited/Cancelled		-
Unvested outstanding at December 31, 2014		8,000		$	10.97
Granted		9,211		$	13.66
Vested		(13,211	)	$	12.84
Forfeited/Cancelled		-
Unvested outstanding at December 31, 2015		4,000		$	10.97

	Shares of Restricted Stock Units			Weighted Average Grant Date Fair Value
Unvested outstanding at January 1, 2014		144,243		$	11.26
Granted		--
Vested		(37,925	)	$	10.09
Forfeited/Cancelled		(2,500	)	$	10.71
Unvested outstanding at December 31, 2014		103,319		$	11.71
Granted		24,210		$	14.61
Vested		(24,892	)	$	11.55
Forfeited/Cancelled		(8,057	)	$	10.54
Unvested outstanding at December 31, 2015		94,580		$	12.55