Note 15 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Income Tax Expense (Benefit), Total	$ (2,240)	$ (274)
Income Tax Expense (Benefit), Total		$ 600
Effective Income Tax Rate Reconciliation, Percent, Total	27.40%
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Effective Income Tax Rate Reconciliation, Percent, Total	27.00%	28.10%
Domestic Tax Authority [Member] | Canada Revenue Agency [Member]
Effective Income Tax Rate Reconciliation, Percent, Total	28.10%	26.50%
Domestic Tax Authority [Member] | Ministry of Finance, Republic of Serbia [Member]
Effective Income Tax Rate Reconciliation, Percent, Total	15.50%	15.10%