Note 8 - Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended	6 Months Ended
	Mar. 11, 2021	Mar. 11, 2021	Mar. 08, 2021	Jun. 25, 2022	Jun. 25, 2022	Jun. 26, 2021	May 04, 2022	May 03, 2022	Dec. 25, 2021	[1]	Oct. 28, 2021
Proceeds from Issuance of Common Stock					$ 0	$ 223,119
Stock Repurchase Program, Authorized Amount											$ 70,000
Stock Repurchased During Period, Shares (in shares)				504,102	717,808
Stock Repurchased During Period, Value				$ 14,000	$ 20,400
Stock Repurchase Program, Remaining Authorized Repurchase Amount				$ 42,300	$ 42,300
Common Stock, Shares Authorized (in shares)				90,000,000	90,000,000		90,000,000	60,000,000	90,000,000
Underwritten Public Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares)			4,950,000
Shares Issued, Price Per Share (in dollars per share)			$ 41.00
Proceeds from Issuance of Common Stock	$ 223,100
Over-Allotment Option [Member]
Stock Issued During Period, Shares, New Issues (in shares)		742,500

[1] Derived from December 25, 2021 audited financial statements