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Segment Reporting (Tables)

9 Months Ended

Oct. 31, 2014

Segment Reporting [Abstract]

Schedule of Segment Reporting Information Profit Loss And Revenue Percentage [Table Text Block]

The following table summarizes segment and other results and assets (amounts in thousands):

		Three Months Ended October 31,								Nine Months Ended October 31,
		2014				2013				2014				2013
Net sales and revenue:
Alternative energy		$	138,363			$	166,039			$	444,323			$	519,653
Real estate			91				149				299				348
Total net sales and revenues		$	138,454			$	166,188			$	444,622			$	520,001

Segment gross profit (loss):
Alternative energy		$	36,506			$	18,002			$	111,940			$	37,918
Real estate			(9	)			26				17				6
Total gross profit		$	36,497			$	18,028			$	111,957			$	37,924

		Three Months Ended October 31,								Nine Months Ended October 31,
		2014				2013				2014				2013
Segment profit (loss):
Alternative energy		$	41,412			$	16,491			$	121,797			$	34,231
Real estate			(34	)			(35	)			(63	)			(179	)
Corporate expense, net			(801	)			(604	)			(2,319	)			(2,010	)
Income from continuing operations before income taxes and noncontrolling interests		$	40,577			$	15,852			$	119,415			$	32,042

Schedule of Segment Reporting Information Assets [Table Text Block]

		October 31, 2014				January 31, 2014
Assets:
Alternative energy		$	416,703			$	356,589
Real estate			4,145				4,722
Corporate			49,530				66,557
Total assets		$	470,378			$	427,868