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 adjustment			0	0	(790,464)	0	(116,171)
Cash dividends declared			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	0	(404,257)	0	0	275,664	(128,593)
Foreign currency translation adjustment		0	0	0	(330,750)	0	(99,520)	(365,977)
Cash dividends declared		0	0	(1,033,551)	0	0	0	(1,033,551)
Unrealized investment loss, net		0	0	0	(1,966)	0	0	(1,966)
Repurchase of Class A common stock	0	0	0	0	0	(173,278)	0
Repurchase of Class A common stock (in shares)	0	0				16,091
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		0	178,100	0	0	0	0
Tax impact of share based compensation		0	(31,695)	0	0	0	0
Distributions to noncontrolling interests		0	0	0	0	0	(380,048)
Reclassification adjustment for prior period acquisitions of noncontrolling interests		0	(2,256,809)	0	0	0	2,256,809
Purchase of additional noncontrolling interests	0	0	(605,653)	0	64,293	553,158	(1,156,652)
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				4,470
Balance at Jan. 31, 2014	$ 26,851	$ 17,087	$ 17,106,362	$ 23,928,045	$ (352,950)	$ (1,223,899)	$ 3,991,639	$ 43,493,135
Balance (in shares) at Jan. 31, 2014	2,685,151	1,708,574				104,025