Note 3 - Revenue From Contracts With Customers - Contract Balance (Details) $ in Thousands	6 Months Ended
	Jun. 27, 2020 USD ($)
Contract assets, balance	$ 5,569
Revenues recorded during the period	7,530
Transferred to Accounts receivable or collected	(7,313)
Contract assets, balance	5,786
Contract liabilities	2,313
Accruals for estimated future stock rotation and scrap returns	2,790
Less: Release of accruals for recognized stock rotation and scrap returns	(2,318)
Prepayment for performance obligations expected to be satisfied within three months	199
Contract liabilities	$ 2,984