Note 3 - Business Combinations - Acquired Identifiable Intangible Assets (Details) - USD ($) $ in Thousands		12 Months Ended
	Dec. 21, 2017	Nov. 28, 2020
Customer Relationships [Member]
Useful Life (Year)		14 years
Acquisition of Lane Venture [Member]
Intangible assets	$ 7,360
Acquisition of Lane Venture [Member] | Customer Relationships [Member]
Intangible assets	$ 512
Useful Life (Year)	9 years
Acquisition of Lane Venture [Member] | Trade Names [Member]
Intangible assets	$ 6,848