Schedule of Long-Term Assets by Geographic Segment (Details) (USD $)	9 Months Ended	12 Months Ended
	Apr. 30, 2013	Jul. 31, 2012
Segment Information Schedule Of Long-term Assets By Geographic Segment 1	$ 17,322,593
Segment Information Schedule Of Long-term Assets By Geographic Segment 2	10,712,052
Segment Information Schedule Of Long-term Assets By Geographic Segment 3	1,081,919
Segment Information Schedule Of Long-term Assets By Geographic Segment 4	0
Segment Information Schedule Of Long-term Assets By Geographic Segment 5	13,080,555
Segment Information Schedule Of Long-term Assets By Geographic Segment 6	42,197,119
Segment Information Schedule Of Long-term Assets By Geographic Segment 7	8,368,243
Segment Information Schedule Of Long-term Assets By Geographic Segment 8	6,914
Segment Information Schedule Of Long-term Assets By Geographic Segment 9	27,143
Segment Information Schedule Of Long-term Assets By Geographic Segment 10	36,539
Segment Information Schedule Of Long-term Assets By Geographic Segment 11	36,877
Segment Information Schedule Of Long-term Assets By Geographic Segment 12	8,475,716
Segment Information Schedule Of Long-term Assets By Geographic Segment 13	6,024,345
Segment Information Schedule Of Long-term Assets By Geographic Segment 14	15,000
Segment Information Schedule Of Long-term Assets By Geographic Segment 15	814
Segment Information Schedule Of Long-term Assets By Geographic Segment 16	0
Segment Information Schedule Of Long-term Assets By Geographic Segment 17	0
Segment Information Schedule Of Long-term Assets By Geographic Segment 18	6,040,159
Segment Information Schedule Of Long-term Assets By Geographic Segment 19	31,715,181
Segment Information Schedule Of Long-term Assets By Geographic Segment 20	10,733,966
Segment Information Schedule Of Long-term Assets By Geographic Segment 21	1,109,876
Segment Information Schedule Of Long-term Assets By Geographic Segment 22	36,539
Segment Information Schedule Of Long-term Assets By Geographic Segment 23	13,117,432
Segment Information Schedule Of Long-term Assets By Geographic Segment 24	56,712,994
Segment Information Schedule Of Long-term Assets By Geographic Segment 1		17,823,405
Segment Information Schedule Of Long-term Assets By Geographic Segment 2		10,612,052
Segment Information Schedule Of Long-term Assets By Geographic Segment 3		1,078,907
Segment Information Schedule Of Long-term Assets By Geographic Segment 4		0
Segment Information Schedule Of Long-term Assets By Geographic Segment 5		13,080,556
Segment Information Schedule Of Long-term Assets By Geographic Segment 6		42,594,920
Segment Information Schedule Of Long-term Assets By Geographic Segment 7		8,919,784
Segment Information Schedule Of Long-term Assets By Geographic Segment 8		7,331
Segment Information Schedule Of Long-term Assets By Geographic Segment 9		45,987
Segment Information Schedule Of Long-term Assets By Geographic Segment 10		63,476
Segment Information Schedule Of Long-term Assets By Geographic Segment 11		44,656
Segment Information Schedule Of Long-term Assets By Geographic Segment 12		9,081,234
Segment Information Schedule Of Long-term Assets By Geographic Segment 13		5,527,227
Segment Information Schedule Of Long-term Assets By Geographic Segment 14		15,000
Segment Information Schedule Of Long-term Assets By Geographic Segment 15		813
Segment Information Schedule Of Long-term Assets By Geographic Segment 16		0
Segment Information Schedule Of Long-term Assets By Geographic Segment 17		0
Segment Information Schedule Of Long-term Assets By Geographic Segment 18		5,543,040
Segment Information Schedule Of Long-term Assets By Geographic Segment 19		32,270,416
Segment Information Schedule Of Long-term Assets By Geographic Segment 20		10,634,383
Segment Information Schedule Of Long-term Assets By Geographic Segment 21		1,125,707
Segment Information Schedule Of Long-term Assets By Geographic Segment 22		63,476
Segment Information Schedule Of Long-term Assets By Geographic Segment 23		13,125,212
Segment Information Schedule Of Long-term Assets By Geographic Segment 24		$ 57,219,194