Note 20 - Severance, Professional Fees and Other Charges (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Severance, Professional Fees and Other Charges	$ 0	$ 1,571
Transactional Advisory Fees, Legal Fees, and Search Fees [Member]
Severance, Professional Fees and Other Charges		700
Former Chief Executive Officer [Member] | Severance Accrued and Related Payroll Taxes, Continuation of Certain Benefits and Professional Fees [Member]
Severance, Professional Fees and Other Charges		$ 900