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Accrued Warranty (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2016 | Dec. 26, 2015
Product Warranties Disclosures [Abstract] |  |
Product warranty term | 12 months |
Movement in Standard Product Warranty Accrual [Roll Forward] |  |
Beginning Balance | $ 518,000 | $ 716,000
Additions | 440,000 | 598,000
Claims and reversals | (440,000) | (796,000)
Ending Balance | $ 518,000 | $ 518,000

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- Definition Standard Product Warranty Accrual, Payments and Reversals + References No definition available. + Details
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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. + References No definition available. + 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=68068213&loc=d3e12565-110249 + Details
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- Definition Amount of increase in the standard product warranty accrual from warranties issued. Excludes extended product warranties. + 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)(3)) -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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