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v3.20.1

Commitments and Contingencies: (Details) - USD ($) | 12 Months Ended
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Dec. 28, 2019 | Dec. 29, 2018 | Dec. 30, 2017
Employee Benefit Plan |  |  |
Service period for vesting of employer contribution | 5 years |  |
Company contributions | $ 343,500 | $ 361,400 | $ 319,700

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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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- Definition The minimum period for which an individual is required to perform services in order to be fully vested for employer contribution under the defined contribution plan. + References No definition available. + Details
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