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		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Net Sales	[1]	$ 151,333	$ 107,590	$ 429,511	$ 309,620
Grocery (including Online), Mass and Club [Member]
Net Sales		132,757	91,148	375,847	259,227
Pet Specialty and Natural [Member]
Net Sales		$ 18,576	$ 16,442	$ 53,664	$ 50,393

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