Note 11 - Commitments and Contingencies - Other Information Regarding Leases (Details) $ in Thousands	12 Months Ended
Dec. 31, 2020 USD ($)
Sublease income	$ 756
Cash paid for operating leases	$ 1,280
Weighted average remaining lease term (years) - operating leases (Year)	6 years
Weighted average discount rate – operating leases	8.25%

Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
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-Section 45
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Weighted average discount rate for operating lease calculated at point in time.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
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-Topic 842
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Amount of sublease income excluding finance and operating lease expense.

+ References

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-Publisher FASB
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