Note 18 - Quarterly Results of Operations (Unaudited) (Details) - Quarterly Financial Information (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information [Abstract]
Operating revenues	$ 141,417	$ 141,822	$ 139,738	$ 132,027	$ 134,771	$ 124,416	$ 129,569	$ 123,673	$ 555,005	$ 512,428
Operating expenses and costs	146,109	142,026	140,683	134,854	138,552	132,941	133,898	130,309	563,672	535,700
Operating loss	(4,692)	(204)	(945)	(2,827)	(3,781)	(8,525)	(4,329)	(6,636)	(8,667)	(23,272)
Other expenses, net	2,390	356	901	783	1,100	1,002	975	911
Loss before income taxes	(7,082)	(560)	(1,846)	(3,610)	(4,881)	(9,527)	(5,304)	(7,547)	(13,098)	(27,260)
Income tax (benefit) expense	(2,446)	42	(448)	(1,136)	(1,641)	(3,455)	(1,818)	(2,674)	(3,988)	(9,589)
Net loss	$ (4,636)	$ (602)	$ (1,398)	$ (2,474)	$ (3,240)	$ (6,072)	$ (3,486)	$ (4,873)	$ (9,110)	$ (17,671)
Average shares outstanding (Basic) (in Shares)	10,323	10,322	10,293	10,305	10,313	10,312	10,304	10,300	10,323	10,310
Basic loss per share (in Dollars per share)	$ (0.45)	$ (0.06)	$ (0.14)	$ (0.24)	$ (0.31)	$ (0.59)	$ (0.34)	$ (0.47)	$ (0.88)	$ (1.71)
Average shares outstanding (Diluted) (in Shares)	10,323	10,322	10,293	10,305	10,313	10,312	10,304	10,300	10,323	10,310
Diluted loss per share (in Dollars per share)	$ (0.45)	$ (0.06)	$ (0.14)	$ (0.24)	$ (0.31)	$ (0.59)	$ (0.34)	$ (0.47)	$ (0.88)	$ (1.71)