Note 1 - Summary of Significant Accounting Policies - Computation of Basic and Diluted Income (Loss) Per Share (Details) - shares shares in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Weighted average common shares (in shares)	43,756	41,502
Effect of dilutive securities (in shares)	1,726	0
Weighted Average Number of Shares Outstanding, Diluted, Total	45,482	41,502