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Note 8 - Common Stock Reserved for Future Issuance (Details)	Jun. 30, 2016 shares
Series B Convertible Preferred Stock [Member]
Common Stock, Capital Shares Reserved for Future Issuance	285,714
Series C Convertible Preferred Stock [Member]
Common Stock, Capital Shares Reserved for Future Issuance	30,460,662
Warrant [Member]
Common Stock, Capital Shares Reserved for Future Issuance	51,377,569
Employee Stock Option [Member]
Common Stock, Capital Shares Reserved for Future Issuance	4,722,529
Common Stock, Capital Shares Reserved for Future Issuance	86,846,474

X

- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Details

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Namespace Prefix:
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X

- Details

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Period Type:

X

- Details

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X

- Details

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