Subsequent Events - Additional Information (Detail) (Subsequent Events [Member], Term loan facility [Member], USD $) In Millions, unless otherwise specified	1 Months Ended
	Apr. 30, 2014
Subsequent Event [Line Items]
End of term payment	$ 1.0
Amount of make-whole premium payment	0.3
Expected total repayment	1.4
Percentage of accrue interest	12.50%
Percentage of deferred payment	3.50%
End of deferred payment term	Six-year term
Interest payment period	5 years
Maximum [Member]
Subsequent Event [Line Items]
Credit facility, additional borrowing capacity	45.0
Credit facility, minimum amount committed to borrow under term loan agreement capacity	30.0
Option 1 [Member] | Maximum [Member]
Subsequent Event [Line Items]
Credit facility, additional borrowing capacity	$ 52.0