Number of shares issued in exchange for warrants during period.

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- Definition

Value of shares issued in exchange for warrants during period.

+ References

No definition available.

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-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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- Definition

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

+ References

No definition available.

+ Details

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- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

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- Definition

Number of warrants or rights outstanding.

+ References

No definition available.

+ Details

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- Definition

The aggregate value of preferred stock dividends and other adjustments necessary to derive net income apportioned to common stockholders.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=121326447&loc=d3e1377-109256

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Note 9 - Warrants (Details Textual) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended	6 Months Ended
	Feb. 24, 2020	Mar. 31, 2020	Jun. 30, 2020	Mar. 10, 2020	Apr. 28, 2017
Class of Warrant or Right, Outstanding (in shares)			46,461,630
Stock issued During Period, Value, Exchange of Shares for Warrants		$ 2,470
Preferred Stock Dividends and Other Adjustments, Total			$ 400
Common Stock [Member]
Stock issued During Period, Shares, Exchange of Shares for Warrants (in shares)		2,041,000
Stock issued During Period, Value, Exchange of Shares for Warrants		$ 2
Additional Paid-in Capital [Member]
Stock issued During Period, Value, Exchange of Shares for Warrants		$ 2,468
Exchange Agreement [Member] \| Common Stock [Member]
Stock issued During Period, Shares, Exchange of Shares for Warrants (in shares)	2,040,757
Exchange Agreement [Member] \| Additional Paid-in Capital [Member]
Stock issued During Period, Value, Exchange of Shares for Warrants	$ 2,500
Series B Warrant [Member]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)					0.058
Class of Warrant or Right, Outstanding (in shares)	3,638,780
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)			$ 0.37		$ 13.00
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			530,381
Series B Warrant [Member] \| Exchange Agreement [Member]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)	0.61
Class of Warrant or Right, Outstanding (in shares)	3,373,900
Series C Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)				1
Class of Warrant or Right, Outstanding (in shares)				25,367,646
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)				$ 0.68
Series D Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)				1
Class of Warrant or Right, Outstanding (in shares)				25,367,646
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)				$ 0.68