Note 16 - Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

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

	2015			2014			2013
Dividend yield(1)		0.0%			0.0%			0.0%
Expected volatility(2)	53.78%	to	56.00%	55.79%	to	57.99%	54.88%	to	55.61%
Risk-free interest rate(3)	1.49%	to	2.00%	1.51%	to	2.26%	1.28%	to	2.03%
Expected life (years)(4)	5.5	to	7.0	5.5	to	7.0		7.0
Assumed forfeiture rate		19.0%			23.0%			23.0%

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

	2015		2014		2013
Stock based compensation expense recognized	$	600,000	$	420,000	$	325,000
Number of unvested stock options		1,173,276		1,039,638		909,313
Fair value of unvested stock options	$	1,906,691	$	1,548,840	$	1,245,679
Amount remaining to be recognized as expense	$	873,714	$	702,220	$	545,862

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

	For the Years Ended December 31,
	2015					2014					2013
	Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price
Outstanding, beginning of year		1,494,399		$	3.59		1,215,530		$	3.66		964,530		$	4.38
Granted		505,200			3.55		360,900			3.69		347,250			2.72
Exercised		(21,500	)		3.01		(500	)		1.95		-			-
Forfeited		(31,874	)		5.13		(81,531	)		5.15		(96,250	)		7.39
Outstanding, end of year		1,946,225		$	3.56		1,494,399		$	3.59		1,215,530		$	3.66
Options exercisable at year-end		772,949		$	4.18		454,761		$	5.06		306,217		$	6.24
Weighted average fair value of options granted during the year				$	1.89				$	2.07				$	1.51

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

	For the Years Ended December 31,
	2015		2014		2013
Number of options exercised		21,500		500		-
Cash received	$	64,624	$	975	$	-
Intrinsic value	$	26,532	$	1,010	$	-
Tax benefit	$	-	$	-	$	-

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

			Options Outstanding						Options Exercisable
Range of Exercise Prices			Number Outstanding		Weighted- Average Remaining  Contractual Life		Weighted- Average Exercise Price		Shares		Weighted- Average  Exercise Price
$1.55	to	$2.95		625,125		6.7	$	2.33		208,837	$	2.30
$3.14	to	$3.55		667,950		8.2		3.46		166,250		3.21
$3.68	to	$8.00		637,750		6.0		4.67		382,462		5.31
$11.77	to	$12.13		15,400		0.7		11.91		15,400		11.91
				1,946,225			$	3.56		772,949	$	4.18

Schedule of Nonvested Share Activity [Table Text Block]

	Number of Shares			Weighted- Average Grant Date Fair Value
Nonvested, beginning of year		1,039,638		$	1.49
Granted		505,200			1.89
Vested		(349,062	)		1.68
Forfeited		(22,500	)		1.80
Nonvested, end of year		1,173,276		$	1.63