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v3.19.3

Concentration of risk (Details) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 28, 2019 USD ($) Customer | Dec. 29, 2018 USD ($) Customer
Accounts Receivable, Net [Abstract] |  |
Receivables due amount | $ 43,536,854 | $ 30,285,316
Term Loan [Member] | Minimum [Member] |  |
Interest Rate Risk [Abstract] |  |
Basis spread on variable rate | 1.25% |
Term Loan [Member] | Maximum [Member] |  |
Interest Rate Risk [Abstract] |  |
Basis spread on variable rate | 2.25% |
Term Loan [Member] | LIBOR [Member] |  |
Interest Rate Risk [Abstract] |  |
Term of variable rate | 1 month |
Term Loan [Member] | Interest Rate Swap [Member] |  |
Interest Rate Risk [Abstract] |  |
Interest rate swap, notional amount | $ 50,000,000 |
Revolving Credit Loan [Member] | LIBOR [Member] | Minimum [Member] |  |
Interest Rate Risk [Abstract] |  |
Basis spread on variable rate | 1.25% |
Revolving Credit Loan [Member] | LIBOR [Member] | Maximum [Member] |  |
Interest Rate Risk [Abstract] |  |
Basis spread on variable rate | 2.25% |
Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |
Accounts Receivable, Net [Abstract] |  |
Number of major customers | Customer |  | 0
Percentage of concentration risk |  | 10.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Ford Motor Company [Member] |  |
Accounts Receivable, Net [Abstract] |  |
Number of major customers | Customer | 1 |
Receivables due amount | $ 6,315,000 |
Percentage of concentration risk | 14.00% |

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- Definition Term of interest rate that fluctuates over time as a result of an underlying benchmark interest rate or index, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Number of customers that exceed the threshold percentage of concentration risk. + References No definition available. + Details
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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118951113&loc=d3e6676-107765 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4531-111522 + Details
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13531-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13537-108611 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592 + Details
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