Condensed Consolidated Statements of Shareholders' Equity (Unaudited) (USD $)	Common Stock [Member] Class A [Member]	Common Stock [Member] Class B [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]	Total
Balance at Jul. 31, 2012	$ 26,851	$ 17,087	$ 19,751,992	$ 29,534,783	$ 711,842	$ (1,897,032)	$ 4,612,018
Balance (in shares) at Jul. 31, 2012	2,685,151	1,708,574				149,531
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income			0	(2,130,434)	0	0	908,386
Foreign currency translation adjustments			0	0	(790,464)	0	(116,171)
Cash dividends paid			0	(2,038,496)	0	0	0
Unrealized investment loss, net			0	0	(28,675)	0	0
Share-based compensation expense			507,796	0	0	0	0
Tax impact of share based compensation			(74,429)	0	0	0	0
Distributions to noncontrolling interests			0	0	0	0	(1,532,912)
Purchase of additional noncontrolling interests	0	0	(168,486)	0	22,770	98,799	(775,935)
Purchase of additional noncontrolling interests (in shares)	0	0				(7,804)
Stock award plan forfeitures	0	0	0	0	0	0	0
Stock award plan forfeitures (in shares)	0	0				2,184
Balance at Jul. 31, 2013	26,851	17,087	20,016,873	25,365,853	(84,527)	(1,798,233)	3,095,386	46,639,290
Balance (in shares) at Jul. 31, 2013	2,685,151	1,708,574				143,911
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income			0	380,391	0	0	134,723	515,114
Foreign currency translation adjustments			0	0	193,263	0	(15,530)	235,914
Cash dividends paid								0
Unrealized investment loss, net			0	0	(234)	0	0	(234)
Issuance of stock under stock award plan	0	0	(194,454)	0	0	194,454	0
Issuance of stock under stock award plan (in shares)	0	0				(16,387)
Share-based compensation expense			89,049	0	0	0	0
Tax impact of share based compensation			(31,695)	0	0	0	0
Distributions to noncontrolling interests			0	0	0	0	(141,012)
Purchase of additional noncontrolling interests	0	0	(472,994)	0	58,181	550,750	(1,209,180)
Purchase of additional noncontrolling interests (in shares)	0	0				(44,060)
Stock award plan forfeitures	0	0	0	0	0	0	0
Stock award plan forfeitures (in shares)	0	0				3,991
Balance at Oct. 31, 2013	$ 26,851	$ 17,087	$ 19,406,779	$ 25,746,244	$ 166,683	$ (1,053,029)	$ 1,864,387	$ 46,175,002
Balance (in shares) at Oct. 31, 2013	2,685,151	1,708,574				87,455