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Income Taxes (Details 4) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014
Reconciliation of the beginning and ending liabilities for unrecognized tax benefits |  |
Balance at beginning of period | $ 507 | $ 657
Gross increases in current period tax positions | 62 | 93
Gross increases in prior period tax positions | 19 | 0
Gross decreases in prior period tax positions | (163) | (243)
Balance at end of period | 425 | 507
Accrued interest and penalties at end of period | 139 | 223
Total liability for unrecognized tax benefits | $ 564 | $ 730

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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 -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 Reference 2: 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 + Details
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