Long-Term Debt and Notes Payable - Additional Information (Detail) (Credit Agreement [Member], USD $)	0 Months Ended
	Jan. 31, 2014	Aug. 02, 2013	Jan. 31, 2014 Maximum [Member]	Jan. 31, 2014 Minimum [Member]	Jan. 31, 2014 Base Rate [Member]	Jan. 31, 2014 Eurodollar [Member]	Jan. 31, 2014 Predecessor [Member] Revolving Credit Facility [Member]	Jan. 31, 2013 Predecessor [Member] Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing amount on a revolving basis		$ 50,000,000
Revolving credit facility expiration period		3 years
Line of credit agreement collateralized by percentage of own capital stock		65.00%
Credit Agreement basis points					1.50%	2.50%
Commitment fee on the unused portion of the Credit Agreement			0.50%	0.375%
Available borrowings under the revolving credit facility to secure letters of credit			10,000,000
Leverage Ratio	2.00
Fixed Charge Coverage Ratio	1.25
Adjusted EBITDA	22,000,000
Capital Expenditures to Adjusted EBITDA	1.0
Additional indebtedness	5,000,000
Average borrowing rate on credit agreement	2.67%
Average borrowings under the revolving credit facility							$ 4,982,000	$ 13,046,000