Note 1 - Nature of the Business and Summary of Significant Accounting Policies - Net Sales by Class of Retailer (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Net Sales	[1]	$ 167,522	$ 132,171
Grocery (including Online), Mass and Club [Member]
Net Sales		146,798	115,518
Pet Specialty and Natural [Member]
Net Sales		$ 20,724	$ 16,654

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