Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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-Publisher FASB
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Name:	us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The Company and Summary of Significant Accounting Policies - Foreign Currency Translation (Details)	12 Months Ended
	Dec. 31, 2018 entity	Dec. 31, 2018 company	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
The Company and Summary of Significant Accounting Policies
Equity method investments	7	7
Foreign Currency Translation
Foreign exchange transaction exchange gains (losses)			$ 165,000	$ (602,000)	$ 232,000