Note 10 - Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

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

Schedule of Shar-based Compensation, Stock Options and Restricted Stock Awards, Activity [Table Text Block]

Stock Options	Number Outstanding			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value
Outstanding at January 1, 2011		481,699		$	17,82
Granted		265,703			16.52
Exercised	–			–
Canceled or expired		(55,593	)		14.54
Outstanding at December 31, 2011		691,809			16.88
Granted		145,611			10.08
Exercised		(47,575	)		14.67
Canceled or expired		(64,316	)		29.43
Outstanding at December 31, 2012		725,529			14.63
Granted		187,777			4.39
Exercised		(12,429	)		14.67
Canceled or expired		(38,972	)		16.79
Outstanding at December 31, 2013		861,905		$	12.29		6.6	$	-
Exercisable at December 31, 2013		601,482		$	14.28		6.3	$	-

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

Restricted Stock	Number Outstanding			Weighted Average Exercise Price
Outstanding at January 1, 2011		17,200		$	15.62
Granted		11,333			12.29
Vested and issued		(14,933	)		14.04
Forfeited		(1,407	)		17.82
Non-vested stock awards outstanding at December 31, 2011		12,193		$	14.22
Granted		2,942			16.47
Vested and issued		(9,135	)		15.17
Forfeited		(1,703	)		12.56
Non-vested stock awards outstanding at December 31, 2012		4,294		$	14.63
Granted		111			5.36
Vested and issued		(444	)		8.40
Forfeited		(2,407	)		15.69
Non-vested stock awards outstanding at December 31, 2013		1,557		$	14.13

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		Weighted Average Remaining Contractual Term (in years)		Weighted Average Exercise Price		Number		Weighted Average Remaining Contractual Term (in years)		Weighted Average Exercise Price
$		0.50	-	$8.99		189,630		9.3	$	4.46		62,513		9.3	$	4.46
$		9.00	-	$13.50		477,553		6.1	$	11.12		356,524		5.4	$	11.43
$		13.51	-	$30.00		183,620		4.2	$	21.33		171,343		4.0	$	21.67
	Above		30.00			11,102		0.9	$	57.29		11,102		0.9	$	57.29
						861,905						601,482

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

	Year Ended December 31,
	2013			2012			2011
Risk-free interest rate	0.85	to	1.19%	1.09	to	2.97%	2.29	to	2.97%
Expected volatility	83.4	-	97.9%	80.8	-	82.3%	72.2	-	81.0%
Expected life (in years)	5.25	to	6.00	5.00	to	6.25		6.25
Expected forfeiture rate	5.0	to	7.5%		7.5%			0.0%
Expected dividend yield		0.0%			0.0%			0.0%