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, 2013	$ 26,851	$ 17,087	$ 20,016,873	$ 25,365,853	$ (84,527)	$ (1,798,233)	$ 3,095,386
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	(1,382,656)	0	0	592,203
Foreign currency translation adjustment			0	0	(163,913)	0	(134,287)
Cash dividends declared			0	(2,066,622)	0	0	0
Unrealized investment gain, net			0	0	1,412	0	0
Repurchase of Class A common stock			0	0	0	(173,278)	0
Repurchase of Class A common stock (in shares)						16,091
Issuance of stock under stock award plan			(194,454)	0	0	194,454	0
Issuance of stock under stock award plan (in shares)						(16,387)
Share-based compensation expense			353,295	0	0	0	0
Tax impact of share based compensation			(31,695)	0	0	0	0
Distributions to noncontrolling interests			0	0	0	0	(664,703)
Reclassification adjustment for prior period acquisitions of noncontrolling interests			(2,414,027)	0	0	0	2,381,666
Purchase of additional noncontrolling interests	0	0	(605,653)	0	64,293	553,158	(1,156,652)	[1]	(1,156,652)	[1]
Purchase of additional noncontrolling interests (in shares)	0	0				(44,260)
Stock award plan forfeitures	0	0	0	0	0	0	0
Stock award plan forfeitures (in shares)	0	0				5,999
Balance at Jul. 31, 2014	26,851	17,087	17,124,339	21,916,575	(182,735)	(1,223,899)	4,113,613		41,791,831
Balance (in shares) at Jul. 31, 2014	2,685,151	1,708,574				105,354
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income			0	694,829	0	0	513,373		1,208,202
Foreign currency translation adjustment			0	0	(868,723)	0	(320,912)		(1,189,635)
Cash dividends declared			0	(1,033,071)	0	0	0		(1,033,071)
Unrealized investment gain, net			0	0	13,051	0	0		13,051
Conversion of Class B to Class A common stock	146	(146)	0	0	0	0	0
Conversion of Class B to Class A common stock (in shares)	14,576	(14,576)
Share-based compensation expense			29,515	0	0	0	0
Tax impact of share based compensation			(91,849)	0	0	0	0
Distributions to noncontrolling interests			0	0	0	0	(513,318)
Purchase of additional noncontrolling interests	0	0	(83,690)	0	0	0	(199,531)	[1]	(283,221)	[1]
Purchase of additional noncontrolling interests (in shares)	0	0				0
Balance at Jan. 31, 2015	$ 26,997	$ 16,941	$ 16,978,315	$ 21,578,333	$ (1,038,407)	$ (1,223,899)	$ 3,593,225		$ 39,931,505
Balance (in shares) at Jan. 31, 2015	2,699,727	1,693,998				105,354

[1] Purchases of additional noncontrolling interests are recorded as reductions of shareholders' equity on the condensed consolidated statements of shareholders' equity.