Note 16 - Discontinued Operations (Details) (USD $)	3 Months Ended						12 Months Ended		0 Months Ended	9 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2011	May 30, 2013 Momotombo Power Plant [Member]	Sep. 30, 2013 Momotombo Power Plant [Member]
Note 16 - Discontinued Operations (Details) [Line Items]
Proceeds from Divestiture of Businesses									$ 7,751,000
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	$ 0	$ 0	$ 3,646,000	$ 0	$ 0	$ 0	$ 3,646,000	$ 0		$ 3,600,000