Changes in Stockholders' Equity (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								3 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2012 Common Stock [Member]	Jul. 31, 2012 Common Stock [Member]	Oct. 31, 2012 Additional Paid-In Capital [Member]	Jul. 31, 2012 Additional Paid-In Capital [Member]	Oct. 31, 2012 Treasury Stock [Member]	Jul. 31, 2012 Treasury Stock [Member]	Oct. 31, 2012 Accumulated Deficit [Member]	Oct. 31, 2012 Accumulated Other Comprehensive Income [Member]	Oct. 31, 2012 Noncontrolling Interest [Member]
Summary of changes in Stockholders' Equity
Beginning Balance	$ 6,146		$ 15	$ 15	$ 56,304	$ 56,304	$ (1,501)	$ (1,501)	$ (49,305)		$ 633
Beginning Balance, Shares			3,016,758	3,016,758			139,404	139,404
Comprehensive income:
Net income	135	358							88		47
Comprehensive income	88	351
Ending Balance	$ 6,281		$ 15	$ 15	$ 56,304	$ 56,304	$ (1,501)	$ (1,501)	$ (49,217)		$ 680
Ending Balance, Shares			3,016,758	3,016,758			139,404	139,404