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Note 5 - Acquired Intangible Assets and Goodwill - Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021
Balance at December 26, 2020	$ 32,695	$ 32,695
Acquisition	9,631	0
Balance at December 25, 2021	$ 42,326	$ 32,695

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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