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Credit Facility (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 28, 2018 | Dec. 29, 2017 | May 09, 2016
Revolving line of credit facility [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Borrowing capacity under credit facility | $ 20,000,000 |  | $ 45,000,000
Outstanding balance | $ 6,500,000 | $ 19,000,000 |
Additional borrowing capacity |  |  | $ 25,000,000
Maturity date | May 09, 2021 |  |
Pledge of capital stock to U.S. subsidiaries | 100.00% |  |
Pledge of capital stock to direct foreign subsidiaries | 66.00% |  |
Interest rate | 4.00% |  |
Debt issuance costs | $ 200,000 |  |
Debt balance |  | 6,500,000 |
Amount drawn on loan | 5,000,000 |  |
Payment of principal | $ 17,500,000 |  |
Revolving line of credit facility [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Margin percentage base rate | 1.50% |  |
Revolving line of credit facility [Member] | Base Rate [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Margin percentage base rate | 0.75% |  |
Credit Facility [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Debt issuance costs |  | $ 200,000 |
Term Loan [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Borrowing capacity under credit facility | $ 47,000,000 |  |

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