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, 2022	Dec. 31, 2021	Dec. 31, 2020
Net Sales	[1]	$ 595,344	$ 425,489	$ 318,790
Grocery (including Online), Mass and Club [Member]
Net Sales		524,971	356,965	272,008
Pet Specialty and Natural [Member]
Net Sales		$ 70,373	$ 68,524	$ 46,782

[1] Online sales associated with each class of retailer are included within their respective total.