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Note 6 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	Jun. 01, 2020	Apr. 24, 2020
Maximum Aggregate Offering Price		$ 500,000
Stock Issued During Period, Shares, New Issues (in shares)	22,044,447
Shares Issued, Price Per Share (in dollars per share)	$ 4.50
Proceeds from Issuance or Sale of Equity, Total	$ 107,665
Warrants Issued in Public Offering [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	3,511,111
Class of Warrant or Right, Warrants Issued, Price Per Warrant (in dollars per share)	$ 4.49
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 0.01

X

- Definition

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+ References

No definition available.

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- Definition

Represents the maximum aggregate offering price of common stock, preferred stock, depository shares, stock purchase contracts, warrants and units.

+ References

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

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+ References

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-Publisher FASB
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-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

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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)
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