Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended		1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Jul. 31, 2013
Other Commitments [Line Items]
Third party software vendor licensed lost	$ 934,000
Contractual defenses and insurance cover losses	100,000
Accrued contingent liability	100,000
Provision for losses	0
Expirations of operating leases	2020
Rent expense	1,200,000	1,600,000
Restricted cash	$ 250,000	$ 250,000
Volume pricing agreements period of OVRP	12 months
Bellevue [Member] | Washington [Member]
Other Commitments [Line Items]
Expiration date of operating lease	2020-05		2014-08