Note 15 - Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

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

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

	2014	2013	2012
Dividend yield(1)	0.0%	0.0%	0.0%
Expected volatility(2)	55.79% to 57.99%	54.88% to 55.61%	53.12% to 54.49%
Risk-free interest rate(3)	1.51% to 2.26%	1.28% to 2.03%	1.01% to 1.61%
Expected life(4)	5.5 to 7.0 years	7.0 years	7.0 years

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

	2014		2013		2012
Stock based compensation expense recognized	$	420,000	$	325,000	$	370,000
Number of unvested stock options		1,039,638		909,313		710,600
Fair value of unvested stock options	$	1,548,840	$	1,245,679	$	1,091,948
Amount remaining to be recognized as expense	$	702,220	$	545,862	$	467,314

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

	For the Years Ended December 31,
	2014					2013					2012
	Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price
Outstanding, beginning of year		1,215,530		$	3.66		964,530		$	4.38		839,417		$	6.04
Granted		360,900			3.69		347,250			2.72		296,750			1.95
Exercised		(500	)		1.95		-			-		-			-
Forfeited		(81,531	)		5.15		(96,250	)		7.39		(171,637	)		8.32
Outstanding, end of year		1,494,399		$	3.59		1,215,530		$	3.66		964,530		$	4.38
Options exercisable at year-end		454,761		$	5.06		306,217		$	6.24		253,930		$	7.92
Weighted average fair value of options granted during the year				$	2.07				$	1.51				$	1.05

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

	For the Years Ended December 31,
	2014		2013		2012
Number of options exercised		500		-		-
Cash received	$	975	$	-	$	-
Intrinsic value	$	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
$1.39 to $2.95		635,125		7.7	$	2.33		129,637	$	2.33
$3.14 to $5.12		665,150		7.6		3.71		131,000		4.43
$5.70 to $8.00		170,350		3.9		6.74		170,350		6.74
$9.93 to $12.13		23,774		1.3		11.36		23,774		11.36
		1,494,399			$	3.59		454,761	$	5.06

Schedule of Nonvested Share Activity [Table Text Block]

	Number of Shares			Weighted-Average Grant Date Fair Value
Nonvested, beginning of year		909,313		$	1.37
Granted		360,900			2.07
Vested		(209,825	)		1.65
Forfeited		(20,750	)		1.51
Nonvested, end of year		1,039,638		$	1.49