Debt - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended		9 Months Ended			6 Months Ended	3 Months Ended		9 Months Ended
	May 31, 2013	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012	Jan. 31, 2013	Jul. 31, 2014 Subsequent Event [Member]	Oct. 31, 2013 Related Party [Member]	Oct. 31, 2012 Related Party [Member]	Oct. 31, 2013 Related Party [Member]	Oct. 31, 2012 Related Party [Member]	Oct. 31, 2013 Accounts Receivable Securitization Facility [Member]	Oct. 31, 2013 Renewed and Extended [Member]
Debt Disclosure [Line Items]
Remaining outstanding principal	$ 6,852
Accrued interest	60
Deferred origination fees	213
Prepayment interest penalty	290
Additional interest penalties after second anniversary	3.00%
Additional interest penalties prior second year	4.00%
Loss from the extinguishment of debt				(755)			755
Expected savings of cash interest				429
Expected savings of cash interest, year one				428
Expected savings of cash interest, year two				170
Expected savings of cash interest, year three				31
Credit agreement amount		10,000		10,000
Interest rate												1.50%	2.50%
Line of credit, expiration date													May 23, 2013
Interest expense		71	403	628	1,226			0	24	26	91
Line of credit, outstanding amount						$ 0