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Note 13 - Warrants and Derivative Liabilities (Tables)

3 Months Ended

Jun. 30, 2019

Notes Tables

Fair Value Option, Disclosures [Table Text Block]

Fiscal Year 2019		June 30, 2019
Risk-free interest rate		2.11%
Expected annual dividend yield		—
Expected volatility		60.58%
Term (years)		0.37
Fair value		$1.7 million

		March 31,		December 31,		September 30,		June 30,		March 31,
Fiscal Year 2018		2019		2018		2018		2018		2018
Risk-free interest rate		2.43%		2.61%		2.62%		2.40%		2.20%
Expected annual dividend yield		—		—		—		—		—
Expected volatility		75.61%		70.29%		63.66%		67.40%		65.86%
Term (years)		0.62		0.87		1.12		1.37		1.62
Fair value		$4.6 million		$3.6 million		$1.3 million		$1.6 million		$1.1 million

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- Definition

Tabular disclosure of information about asset and liability measured at fair value under fair value option.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14210-108612

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 32
-URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14217-108612

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612

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- References

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