Note 16 - Discontinued Operations (Details) - Net Assets of Momotombo Power Company (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	May 30, 2013 Momotombo Power Plant [Member]
Note 16 - Discontinued Operations (Details) - Net Assets of Momotombo Power Company [Line Items]
Cash and cash equivalents	$ 57,354		$ 52
Accounts receivable			2,274
Prepaid expenses and other	29,654		167
Property, plant and equipment	2,053,401	1,797,543	3,935
Accounts payable and accrued expenses	(98,047)	(98,001)	(493)
Deferred income taxes			(442)
Accrued severance pay			(313)
Other liabilities			(590)
Net assets			$ 4,590