Note 8 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net operating loss carryforwards	$ 27,500	$ 12,314
Stock-based compensation	2,066	1,678
Accruals and reserves	2,902	427
Inventory	236	142
Lease liabilities	4,198	2,247
Tax credit carryforward	594	225
Other	318	48
Total deferred tax assets	37,814	17,081
Intangibles	(35,241)	(5,025)
Right-of-use assets	(4,070)	(2,261)
Fair value change in investments	(294)	(287)
Fixed assets	(1,203)	(959)
Other	0	(51)
Total deferred tax liabilities	(40,808)	(8,583)
Net deferred tax (liabilities) assets before valuation allowance	(2,994)	8,498
Less: valuation allowance	(2,493)	(8,498)	$ (8,706)	$ (8,345)
Net deferred tax liabilities	$ (5,487)	$ 0