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Note 24 - Subsequent Events	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Subsequent Events [Text Block]	NOTE 24 — SUBSEQUENT EVENTS Cash dividend On March 1, 2018, the Company ’s Board of Directors declared, approved and authorized payment of a quarterly dividend of $11.5 million ( $0.23 per share) to all holders of the Company’s issued and outstanding shares of common stock on March 14, 2018, payable on March 29, 2018. U.S. Geothermal transaction On January 24, 2018 the Company entered into a definitive agreement to acquire U.S. Geothermal Inc. (“U.S. Geothermal”), a renewable energy company focused on the development, production and sale of electricity from geothermal energy. Under the terms of the merger agreement, holders of U.S. Geothermal common stock will receive $5.45 per share in cash. On a fully diluted basis, including payment to U.S. Geothermal’s option holders, the Company will pay total consideration of approximately $109.9 million. The closing of the merger is subject to customary conditions, including receipt of regulatory approvals and approval by persons holding a majority of the outstanding shares of U.S. Geothermal common stock. The transaction is expected to close in the second quarter of 2018. U.S. Geothermal is currently operating geothermal power projects at Neal Hot Springs, Oregon, San Emidio, Nevada and Raft River, Idaho for a total designed net output of 45 MW that currently generate approximately 38 MW , net.

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The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

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