Interest Expense and Other Income (Expense) - Components of Interest Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Interest Expense [Line Items]
Interest expense	$ 406	$ 150	$ 663	$ 310
Interest on debt [Member]
Interest Expense [Line Items]
Interest expense	138	110	347	229
Waiver and amortization of loan fees [Member]
Interest Expense [Line Items]
Interest expense	268	24	306	48
Interest rate swap amortization [Member]
Interest Expense [Line Items]
Interest expense		$ 16	$ 10	$ 33