Note 12 - Subsequent Events	6 Months Ended
Jun. 30, 2015
Subsequent Events [Abstract]
Subsequent Events [Text Block]	NOTE 12 — SUBSEQUENT EVENTS Amatitlan refinancing On July 31, 2015, the Company finalized and closed a 12-year limited-recourse term loan in the principal amount of $42.0 million to refinance the 20 MW Amatitlan power plant in Guatemala. Under the loan agreement with Banco Industrial S.A., Guatemala's largest bank, and its affiliate Westrust Bank, the Company has the flexibility to expand the Amatitlan power plant with financing to be provided either via equity, additional debt from Banco Industrial S.A. or from other lenders. This loan agreement replaces the senior secured project loan from EIG Global Project Fund II, Ltd. (formerly TCW) which the Company signed in May 2009 and prepaid in full in September 2014 from corporate funds. Cash dividend On August 3, 2015, the Company’s Board of Directors declared, approved and authorized payment of a quarterly dividend of $2.9 million ($0.06 per share) to all holders of the Company’s issued and outstanding shares of common stock on August 18, 2015, payable on September 2, 2015.

Note 12 - Subsequent Events

6 Months Ended

Jun. 30, 2015

NOTE 12 — SUBSEQUENT EVENTS

Amatitlan refinancing

On July 31, 2015, the Company finalized and closed a 12-year limited-recourse term loan in the principal amount of $42.0 million to refinance the 20 MW Amatitlan power plant in Guatemala. Under the loan agreement with Banco Industrial S.A., Guatemala's largest bank, and its affiliate Westrust Bank, the Company has the flexibility to expand the Amatitlan power plant with financing to be provided either via equity, additional debt from Banco Industrial S.A. or from other lenders. This loan agreement replaces the senior secured project loan from EIG Global Project Fund II, Ltd. (formerly TCW) which the Company signed in May 2009 and prepaid in full in September 2014 from corporate funds.

Cash dividend

On August 3, 2015, the Company’s Board of Directors declared, approved and authorized payment of a quarterly dividend of $2.9 million ($0.06 per share) to all holders of the Company’s issued and outstanding shares of common stock on August 18, 2015, payable on September 2, 2015.