The Company and Summary of Significant Accounting Policies Correction of Immaterial Error (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Other income (expense), net	$ 0	$ (86)	$ (178)	$ (178)
Total other income, net	128	41	51	53
Net income	$ 3,316	$ 1,657	$ 6,318	$ 1,226
Basic (USD per share)	$ 0.10	$ 0.05	$ 0.19	$ 0.04
Diluted (USD per share)	$ 0.09	$ 0.04	$ 0.16	$ 0.03
Comprehensive income	$ 3,308	$ 1,677	$ 6,335	$ 1,258
Net cash provided by operating activities			25,550	15,194
Net cash used in investing activities			(23,734)	(18,471)
Effect of exchange rate changes on cash and cash equivalents			0	9
Net decrease in cash and cash equivalents			$ 7,554	(697)
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Other income (expense), net		(37)		(138)
Total other income, net		90		93
Net income		$ 1,706		$ 1,266
Basic (USD per share)		$ 0.05		$ 0.04
Diluted (USD per share)		$ 0.05		$ 0.03
Change in foreign currency translation loss, net of tax		$ (49)		$ (40)
Comprehensive income		1,677		1,258
Net cash provided by operating activities				15,175
Net cash used in investing activities				(18,442)
Effect of exchange rate changes on cash and cash equivalents				(30)
Net decrease in cash and cash equivalents				(697)
As Adjusted
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Other income (expense), net		(86)		(178)
Total other income, net		41		53
Net income		$ 1,657		$ 1,226
Basic (USD per share)		$ 0.05		$ 0.04
Diluted (USD per share)		$ 0.04		$ 0.03
Change in foreign currency translation loss, net of tax		$ 0		$ 0
Comprehensive income		$ 1,677		1,258
Net cash provided by operating activities				15,194
Net cash used in investing activities				(18,471)
Effect of exchange rate changes on cash and cash equivalents				9
Net decrease in cash and cash equivalents				$ (697)