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Product Warranties | 12 Months Ended
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Dec. 31, 2017
Guarantees and Product Warranties [Abstract] |
Product Warranties | 11. PRODUCT WARRANTIES Product warranty activity for the years ended December 31 was as follows (in thousands):
|  | 2017 |  |  | 2016 |  |  | 2015 |
Balance at the beginning of the period |  | $ | 214 |  |  | $ | 585 |  |  | $ | 204 |
Accruals for warranties for products sold in the period |  |  | 346 |  |  |  | 358 |  |  |  | 715 |
Fulfillment of warranty obligations |  |  | (194 | ) |  |  | (527 | ) |  |  | (334 | )
Revisions of estimated obligations |  |  | (76 | ) |  |  | (202 | ) |  |  | — |
Balance at the end of the period |  | $ | 290 |  |  | $ | 214 |  |  | $ | 585 |

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- References No definition available. + Details
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- Definition The entire disclosure for standard and extended product warranties and other product guarantee contracts, including a tabular reconciliation of the changes in the guarantor's aggregate product warranty liability for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -URI http://asc.fasb.org/topic&trid=2155896 + Details
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