Note Payable - Additional Information (Detail) - Secured Loan Facility [Member] - USD ($) $ in Millions		6 Months Ended
	May. 29, 2015	Jun. 30, 2015
Debt Instrument [Line Items]
Term of loan		42 months
Interest rate		8.45%
LIBOR floor rate		0.50%
Interest expense per month		$ 1.0
Closing fee from the prior loan	$ 0.4
Final payment fee rate		2.75%
Loan amount prepaid in the first year following execution of credit agreement		5.00%
Loan amount prepaid in each year thereafter		3.00%
Interest rate at period end		8.95%
Exit fee percentage recorded as deferred loan costs		2.75%
Mid Cap [Member]
Debt Instrument [Line Items]
Secured loan facility	30.0
Net proceeds in aggregate amount	$ 20.1
Rate of interest applicable to obligations		4.00%
Secured loan facility due to Midcap		$ 29.7
Unamortized discount net		$ (0.3)