Note 9 - Equity Method Investment (Details) - TEL’s Summarized Financial Information - Income Statement (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Condensed Income Statements, Captions [Line Items]
Operating Income	$ 6,350	$ 11,059	$ 5,635	$ 13,416
TEL [Member]
Condensed Income Statements, Captions [Line Items]
Revenue	12,837	17,741	23,166	31,023
Operating Expenses	11,355	16,552	20,375	29,074
Operating Income	1,482	1,189	2,791	1,949
Net Income	$ 1,197	$ 966	$ 2,208	$ 1,528