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Product Warranty (Details) (USD $) In Thousands, unless otherwise specified | 9 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013
Summary of product warranty activity |  |
Beginning balance | $ 1,269 | $ 814
Charges to expense | 1,447 | 746
Costs incurred | (1,050) | (550)
Ending balance | $ 1,666 | $ 1,010

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- Definition The expense charged against earnings for the period pertaining to standard and extended warranties on the entity's goods and services granted to customers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(3,4)) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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- Definition Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c)(1),(c)(5) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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- Definition Total increases or decreases in the standard product warranty liability for the period. Does not include increases or decreases in an extended warranty liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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