Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended		1 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Aug. 31, 2013 Bellevue, WA [Member]
Other Commitments [Line Items]
Expirations of operating leases	2020
Rent expense	$ 1,600,000	$ 1,800,000
Expirations of operating leases			2014-08
Expirations of operating leases			2020-05
Collateral for a bank letter of credit	$ 250,000	$ 875,000
Volume pricing agreements period of OVRP	12 months