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Note 5 - Investments in Joint Ventures (Tables)

6 Months Ended

Feb. 28, 2014

Equity Method Investments and Joint Ventures [Abstract]

Condensed Balance Sheet [Table Text Block]

		At February 28, 2014
		Total				EXCOR				China				All Other
Current assets		$	60,798,447			$	21,138,250			$	12,498,369			$	27,161,828
Total assets			66,244,262				23,578,234				12,520,341				30,145,687
Current liabilities			17,443,151				3,486,865				3,860,391				10,095,895
Noncurrent liabilities			2,126,033				—				868,005				1,258,028
Joint ventures’ equity			46,675,076				20,091,369				7,791,945				18,791,762
Company’s share of joint ventures’ equity			22,653,729				10,045,687				3,895,973				8,712,069
Company’s share of joint ventures’ undistributed earnings		$	20,232,259			$	10,014,782			$	3,845,973			$	6,371,504

		At August 31, 2013
		Total				EXCOR				China				All Other
Current assets		$	63,052,410			$	25,955,136			$	11,200,355			$	25,896,919
Total assets			68,417,142				28,391,787				11,226,755				28,798,600
Current liabilities			16,107,597				3,572,004				3,080,118				9,455,475
Noncurrent liabilities			2,488,057				—				871,886				1,616,171
Joint ventures’ equity			49,821,488				24,819,783				7,274,751				17,726,954
Company’s share of joint ventures’ equity			24,702,981				12,409,893				3,637,375				8,655,713
Company’s share of joint ventures’ undistributed earnings		$	22,281,510			$	12,378,988			$	3,587,375			$	6,315,147

Condensed Income Statement [Table Text Block]

		Six Months Ended February 28, 2014
		Total				EXCOR				China				All Other
Net sales		$	58,050,376			$	18,963,579			$	8,257,630			$	30,829,167
Gross profit			27,600,668				10,072,948				3,834,419				13,693,301
Net income			5,479,724				3,763,017				553,963				1,162,744
Company’s share of equity in income of joint ventures		$	2,823,199			$	1,881,705			$	276,948			$	664,546

		Six Months Ended February 28, 2013
		Total				EXCOR				China				All Other
Net sales		$	54,247,135			$	17,451,153			$	6,929,260			$	29,866,722
Gross profit			25,852,537				9,105,579				3,290,660				13,456,298
Net income			4,728,680				3,260,575				524,546				943,559
Company’s share of equity in income of joint ventures		$	2,292,734			$	1,631,125			$	262,148			$	399,461

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