Tax year that remains open to examination under enacted tax laws, in CCYY format.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

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- Definition

Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

-URI http://asc.fasb.org/extlink&oid=6527854

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15A

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319

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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

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Income Taxes, Reconciliation of Unrecognized Tax Benefits (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of unrecognized tax benefits [Roll Forward]
Unrecognized tax benefits	$ 12us-gaap_UnrecognizedTaxBenefits	$ 12us-gaap_UnrecognizedTaxBenefits
Unrecognized interest and penalties	$ 1
Internal Revenue Service (IRS) [Member] \| Tax Year 2010 [Member]
Reconciliation of unrecognized tax benefits [Roll Forward]
Tax year subject to examination	2010
Internal Revenue Service (IRS) [Member] \| Tax Year 2011 [Member]
Reconciliation of unrecognized tax benefits [Roll Forward]
Tax year subject to examination	2011
Internal Revenue Service (IRS) [Member] \| Tax Year 2012 [Member]
Reconciliation of unrecognized tax benefits [Roll Forward]
Tax year subject to examination	2012
Internal Revenue Service (IRS) [Member] \| Tax Year 2013 [Member]
Reconciliation of unrecognized tax benefits [Roll Forward]
Tax year subject to examination	2013
California Franchise Tax Board [Member] \| Tax Year 2010 [Member]
Reconciliation of unrecognized tax benefits [Roll Forward]
Tax year subject to examination	2010
California Franchise Tax Board [Member] \| Tax Year 2011 [Member]
Reconciliation of unrecognized tax benefits [Roll Forward]
Tax year subject to examination	2011
California Franchise Tax Board [Member] \| Tax Year 2012 [Member]
Reconciliation of unrecognized tax benefits [Roll Forward]
Tax year subject to examination	2012
California Franchise Tax Board [Member] \| Tax Year 2013 [Member]
Reconciliation of unrecognized tax benefits [Roll Forward]
Tax year subject to examination	2013