Changes in Initial Product Warranty Accrual and Expenses Under Initial and Extended Warranties (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
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Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Movement in Standard Product Warranty Accrual | |||
| Initial warranty accrual, beginning balance | $ 1,706 | $ 2,188 | $ 1,449 |
| Provision for estimated warranty cost | 492 | 348 | 1,715 |
| Warranty expenditures | (1,008) | (830) | (976) |
| Initial warranty accrual, ending balance | 1,190 | 1,706 | 2,188 |
| Less warranty accrual, long-term | 70 | 773 | 843 |
| Total warranty accrual, current portion | $ 1,120 | $ 933 | $ 1,345 |
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Carrying value as of the balance sheet date of obligations incurred through that date and due after one year (or beyond the operating cycle if longer) for estimated claims under standard and extended warranty protection rights granted to customers. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of increase in the standard product warranty accrual from warranties issued. Excludes extended product warranties. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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