Note 8 - Preferred Stock and Common Stock Warrants - Allocation of Net Cash Proceeds (Details) $ in Thousands	3 Months Ended
Mar. 31, 2022 USD ($)
Gross proceeds	$ 10,500
Equity issuance costs	(20)
Net proceeds - Initial Fair Value Allocation	10,480
Series C Warrants [Member]
Net proceeds - Initial Fair Value Allocation	644
Per balance sheet upon issuance	644
Series C Preferred Stock Associated Warrants [Member]
Net proceeds - Initial Fair Value Allocation	9,836
Per balance sheet upon issuance	$ 9,836

The amount of cash inflow from issuance of convertible preferred stock and common stock warrants after deducting issuance costs and after beneficial conversion feature allocation.

No definition available.

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- Definition

The cash outflow for cost incurred directly with the issuance of an equity security.

+ References

No definition available.

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- Definition

The cash inflow from issuance of convertible preferred stock and common stock warrants after deducting issuance costs.

+ References

No definition available.

+ Details

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- Definition

The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585

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