Note 2 - Summary of Significant Accounting Policies - Revenue By Country (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Revenue, amount	$ 82,948	$ 21,487
Revenue Benchmark [Member] \| Geographic Concentration Risk [Member]
Revenue, percent	100.00%	100.00%
UNITED STATES
Revenue, amount	$ 80,595	$ 21,487
UNITED STATES \| Revenue Benchmark [Member] \| Geographic Concentration Risk [Member]
Revenue, percent	97.00%	100.00%
All Others [Member]
Revenue, amount	$ 2,353	$ 0
All Others [Member] \| Revenue Benchmark [Member] \| Geographic Concentration Risk [Member]
Revenue, percent	3.00%	0.00%

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-Section 50
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
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-Section S99
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+ Details