Note 16 - Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Accrued expenses	$ 2,511	$ 2,155
Leases	1,830	3,598
Warrants and stock options	4,271	3,356
Intangible assets	0	1,693
Inventories	205	172
Research and development credit	2,126	1,661
Other assets	1,111	129
Net operating loss	14,046	6,647
Less valuation allowance	(13,999)	(9,138)
Total deferred tax assets	12,101	10,273
Deferred tax liabilities:
Depreciation	(31,897)	(32,671)
Goodwill	(9,872)	(7,858)
Intangible assets	(4,394)	0
Leases	(1,830)	(3,598)
Total deferred tax liabilities	(47,993)	(44,127)
Net deferred tax liability	$ (35,892)	$ (33,854)