| Note 5 - Debt | 6 Months Ended | ||
|---|---|---|---|
| Jul. 01, 2018 | |||
| Notes to Financial Statements | |||
| Debt Disclosure [Text Block] | 
 (a)  Debt Facilities The Company borrows money under a Revolving Credit and Security Agreement with PNC Bank, National Association (“PNC”) which governs the PNC Revolving Credit Facility, PNC Long-Term Debt Facility and the PNC Equipment Facility (“PNC Facilities”). The PNC Facilities have a term ending on   January 2, 2021. Advances made under the PNC Revolving Credit Facility bear interest at the U.S. base rate plus 0.75%.The applicable interest rate for the Long-Term Debt Facility is U.S. base rate plus 1.25%.The base commercial lending rate should approximate prime rate. The weighted average interest rate increased to 5.6%for the sixmonths ended  July 1, 2018 compared to 4.6%for the sixmonths ended  July 2, 2017.   As at   July 1, 2018 the remaining funds available to borrow under the PNC Revolving Credit Facility after deducting the current borrowing base conditions was $10,463(  December 31, 2017 -  $5,295). The maximum amount of funds that could be available under the PNC Revolving Credit Facility is $30,000.However, availability under the PNC Revolving Credit Facility is subject to certain conditions, including borrowing base conditions based on eligible inventory and accounts receivable, and certain conditions as determined by the Lender. The Company is required to use a “lock-box” arrangement for the PNC Revolving Credit Facility, whereby remittances from customers are swept daily to reduce the borrowings under this facility. On   March 28, 2018, the Company entered into the Thirteenth Amendment (“Thirteenth Amendment”) of the Revolving Credit and Security Agreement, which was initially entered into on  September 14, 2011 with PNC. Pursuant to the Thirteenth Amendment, the Lender has made a facility available to fund the purchase of capital equipment to a maximum amount of $3,000(the “Equipment Facility”). Loans advanced for the purchase of capital equipment located in Mexico shall notexceed $2,000in aggregate. The Equipment Facility is available to the Company during the period commencing on the  March 28, 2018 and ending on  December 31, 2018 (the “Borrowing Period”). At the end of the Borrowing Period, the Company will be required to repay the Equipment Facility over a three( 3) year period, payable monthly with the balance of the equipment facility coming due on  January 2, 2021 unless the PNC Facilities are extended. The Thirteenth Amendment sets the applicable interest rate margins (which margins are added to an interest rate based upon LIBOR or the U.S. base rate, as applicable, to determine the applicable interest rate) based on U.S. base rate plus 1.75%.The Equipment Facility is governed by the terms and conditions of the PNC Facilities and as such has a term ending on  January 2, 2021. On  June 29, 2018, the Company entered into the Fourteenth Amendment (“Fourteenth Amendment”) of the Revolving Credit and Security Agreement. Pursuant to the Fourteenth Amendment, the Lender has made certain adjustments to the definition of Adjusted EBITDA. In addition, the full $3,000of the Equipment Facility can be utilized for capital equipment located in Mexico.    The Long-Term Debt Facility of  $10,000matures on  January 2, 2021 with quarterly principal payments of $500with the remaining balance due at maturity. The PNC Equipment Facility of $1,894matures on  December 31, 2021 with monthly principal payment of $58over a threeyear period, commencing  January 1, 2019. At   July 1, 2018,  $11,981(  December 31, 2017 -  $12,191) was outstanding under the PNC Revolving Credit Facility and is classified as a current liability based on the requirement to hold a “lock-box” under the terms of the PNC Revolving Credit Facility. At   July 1, 2018,  $7,000(  December 31, 2017 –  $8,000) was outstanding under the Long-Term Debt Facility. At   July 1, 2018,  $1,894(  December 31, 2017 –  $Nil) was outstanding under the PNC Equipment Facility. The PNC Facilities are a joint and several obligations of the Company and its subsidiaries that are borrowers under the facilities and are jointly and severally guaranteed by other subsidiaries of the Company. Repayment under the PNC Facilities is collateralized by the assets of the Company and each of its subsidiaries. (b) Covenants The PNC Facilities agreement contains certain financial and non-financial covenants. The financial covenants require the Company to maintain minimum consolidated fixed charge coverage ratio and limit unfunded capital expenditures (all as defined in the Revolving Credit and Security Agreement governing the PNC Facilities).  The Company must maintain a minimum fixed charge coverage ratio in effect for the  ninemonths ended  July 1, 2018,  twelvemonths ended  September 30, 2018 and thereafter on a rolling twelvemonth basis until  January 2, 2021. The Company is in compliance with the financial covenants included in the PNC Facilities as of   July 1, 2018. |