Note 14 - Related Party Transactions (Details Textual) $ in Thousands	12 Months Ended
	Dec. 29, 2018 USD ($)
FTZ [Member]
Related Party Transaction, Purchases from Related Party	$ 2,018,000
ETZ [Member]
Related Party Transaction, Purchases from Related Party	$ 0
Blackrock [Member]
Ownership Percentage of the Company	14.60%