Note 24 - Quarterly Financial Information (Unaudited)

12 Months Ended

Dec. 31, 2016

Notes to Financial Statements

Quarterly Financial Information [Text Block]

NOTE

24

— QUARTERLY FINANCIAL INFORMATION (UNAUDITED)

	Three Months Ended
	Mar. 31, 2015			June 30, 2015			Sept. 30, 2015			Dec. 31, 2015			Mar. 31, 2016			June 30, 2016			Sept. 30, 2016			Dec. 31, 2016
	(Dollars in thousands, except per share amounts)
Revenues:
Electricity	$	89,953		$	90,926		$	97,245		$	97,796		$	107,868		$	104,001		$	109,795		$	114,628
Product		30,278			49,561			65,607			73,278			43,726			55,860			74,822			51,891
Total revenues		120,231			140,487			162,852			171,074			151,594			159,861			184,617			166,519
Cost of revenues:
Electricity		55,581			62,522			61,501			63,008			63,686			62,243			66,481			69,163
Product		20,625			27,182			42,019			43,927			24,035			31,822			43,647			30,719
Total cost of revenues		76,206			89,704			103,520			106,935			87,721			94,065			110,128			99,882
Gross profit		44,025			50,783			59,332			64,139			63,873			65,796			74,489			66,637
Operating expenses:
Research and development expenses		363			414			335			668			349			595			1,086			732
Selling and marketing expenses		3,433			4,283			4,383			3,978			3,675			3,668			4,793			4,288
General and administrative expenses		10,204			7,443			7,950			9,185			8,749			8,783			19,093			10,085
Write-off of unsuccessful exploration activities		174			--			185			1,220			557			863			1,294			303
Operating income		29,851			38,643			46,479			49,088			50,543			51,887			48,223			51,229
Other income (expense):
Interest income		9			44			53			191			320			245			266			140
Interest expense, net		(17,828	)		(18,859	)		(17,748	)		(18,142	)		(16,023	)		(18,401	)		(17,137	)		(15,828	)
Foreign currency translation and transaction gains (losses)		(1,366	)		(571	)		1,296			(981	)		1,962			(4,332	)		(222	)		(2,942	)
Income attributable to sale of tax benefits		5,552			4,731			8,634			6,514			4,398			4,519			3,463			4,123
Other non-operating income (expense), net		283			(1,675	)		(131	)		(468	)		191			49			(5,546	)		(39	)
Income (loss) from continuing operations, before income taxes and equity in income of investees		16,501			22,313			38,583			36,202			41,391			33,967			29,047			36,683
Income tax benefit (provision)		(5,459	)		(6,056	)		38,211			(11,438	)		(9,509	)		(7,890	)		(11,988	)		(2,450	)
Equity in income (losses) of investees		(775	)		(984	)		(3,133	)		(616	)		(937	)		(1,144	)		(2,653	)		(3,001	)
Net income (loss)		10,267			15,273			73,661			24,148			30,945			24,933			14,406			31,232
Net loss (income) attributable to noncontrolling interest		(235	)		(859	)		(1,522	)		(1,160	)		(1,674	)		(584	)		(2,326	)		(3,002	)
Net income (loss) attributable to the Company's stockholders	$	10,032		$	14,414		$	72,139		$	22,988		$	29,271		$	24,349		$	12,080		$	28,230
Earnings (loss) per share attributable to the Company's stockholders
Basic:
Net income	$	0.21		$	0.29		$	1.47		$	0.47		$	0.60		$	0.49		$	0.24		$	0.57
Diluted:
Net income	$	0.21		$	0.28		$	1.41		$	0.46		$	0.59		$	0.49		$	0.24		$	0.56
Weighted average number of shares used in computation of earnings per share attributable to the Company's stockholders:
Basic		47,244			48,881			49,023			49,074			49,173			49,456			49,599			49,647
Diluted		48,079			50,600			51,113			49,668			49,782			50,137			50,289			50,293