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Schedule of Valuation and Qualifying Accounts (Details) - USD ($) | 12 Months Ended
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Dec. 25, 2021 | Dec. 26, 2020 | Dec. 28, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |  |  |
Begining balance | $ 175,000 | $ 938,000 | $ 304,000
Additions charged to Income | 55,000 | 42,000 | 951,000
Deductions from reserve | (80,000) | (805,000) | (317,000)
Ending balance | $ 150,000 | $ 175,000 | $ 938,000

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- Definition Amount of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + Details
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