Note 6 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Notes Tables

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

	Year Ended December 31,
	2015			2014			2013
Stock-based compensation expense, gross	$	4,019		$	5,012		$	1,974
Income tax benefit at our statutory rate associated with stock-based compensation		(1,567	)		(1,955	)		(770	)
Stock-based compensation expense, net	$	2,452		$	3,057		$	1,204

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

	Year Ended December 31,
	2015					2014					2013
	Number of Shares			Weighted- Average Grant Date Fair Value Per Share		Number of Shares			Weighted- Average Grant Date Fair Value Per Share		Number of Shares			Weighted- Average Grant Date Fair Value Per Share
Restricted stock - common:
Outstanding - beginning of period		385,056		$	9.09		274,838		$	4.43		-		$	-
Granted		150,308			10.27		312,961			11.78		382,062			5.20
Vested		(197,858	)		9.16		(202,743	)		6.93		(107,224	)		7.16
Outstanding - end of period		337,506		$	9.57		385,056		$	9.09		274,838		$	4.43

	Year Ended December 31,
	2015					2014					2013
	Number of Shares			Weighted- Average Grant Date Fair Value Per Share		Number of Shares			Weighted- Average Grant Date Fair Value Per Share		Number of Shares		Weighted- Average Grant Date Fair Value Per Share
Restricted stock - Class A common:
Outstanding - beginning of period		204,473		$	9.81		-		$	-		-	$	-
Granted		287,513			9.37		236,294			9.80		-		-
Vested		(117,293	)		9.85		(31,821	)		9.75		-		-
Outstanding - end of period		374,693		$	9.46		204,473		$	9.81		-	$	-

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

	Year Ended December 31,
	2015				2014				2013
	Number of Shares Underlying Options		Weighted Average Exercise Price		Number of Shares Underlying Options		Weighted Average Exercise Price		Number of Shares Underlying Options			Weighted Average Exercise Price
Common stock:
Options outstanding - beginning of period		274,746	$	1.99		274,746	$	1.99		1,316,068		$	5.98
Options granted		-		-		-		-		-			-
Options exercised		-		-		-		-		(119,822	)		2.34
Options forfeited		-		-		-		-		-			-
Options expired		-		-		-		-		(921,500	)		7.64
Options outstanding - end of period		274,746	$	1.99		274,746	$	1.99		274,746		$	1.99
Options exercisable at end of period		206,064	$	1.99		137,376	$	1.99		68,688		$	1.99