Note 1 - Nature of the Business and Summary of Significant Accounting Policies - Net Sales by Class of Retailer (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net Sales	$ 766,895	$ 595,344	$ 425,489
Grocery (including Online), Mass and Club [Member]
Net Sales	685,307	524,971	356,965
Pet Specialty and Natural [Member]
Net Sales	$ 81,588	$ 70,373	$ 68,524