Commitments and Contingencies (Details) (USD $)	Jul. 31, 2012
Commitments and Contingencies [Abstract]
Estimate of reasonably possible losses	$ 400,000
Contractual Obligations [Abstract]
2012	39,273,416
2013	1,746,230
2014	2,732,538
2015	125,578
2016	119,820
Residual	59,910
Total	44,057,492
Non-cancelable operating leases [Member]
Contractual Obligations [Abstract]
2012	405,191
2013	1,355,104
2014	652,807
2015	125,578
2016	119,820
Residual	59,910
Total	2,718,410
Revolving line of credit [Member]
Contractual Obligations [Abstract]
2012	8,325,496
2013	0
2014	0
2015	0
2016	0
Residual	0
Total	8,325,496
Notes payable - related party [Member]
Contractual Obligations [Abstract]
2012	0
2013	0
2014	2,000,000
2015	0
2016	0
Residual	0
Total	2,000,000
Term debt [Member]
Contractual Obligations [Abstract]
2012	30,542,729
2013	391,126
2014	79,731
2015	0
2016	0
Residual	0
Total	$ 31,013,586