Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Line Items]
Valuation allowance	$ (4,440)	$ (4,730)
Unrecognized tax benefit	5,711	3,658	$ 3,497	$ 343
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 3,400
Internal Revenue Service (IRS)
Income Taxes [Line Items]
Income tax examination description	Our U.S. federal tax returns for 2013 and subsequent years remain open to full examination. Our California tax returns for 2012 and subsequent tax years remain open to full examination.
Federal
Income Taxes [Line Items]
Operating Loss Carryforwards	$ 4,000	10,000
State and Local Jurisdiction
Income Taxes [Line Items]
Operating Loss Carryforwards		2,000
Foreign Tax Authority
Income Taxes [Line Items]
Operating Loss Carryforwards	16,000	4,000
Unrecognized Tax Benefits Before Interest And Penalties
Income Taxes [Line Items]
Unrecognized tax benefit	$ 5,269	$ 3,357	$ 3,397	$ 252