Note 6 - Stockholders' Equity (Detail) - Details of the outstanding warrants by expiration dates:	Oct. 24, 2016	Jun. 22, 2016	Mar. 26, 2016	Mar. 19, 2016	Feb. 12, 2016	Jun. 17, 2015	Mar. 02, 2015	Oct. 31, 2012	Mar. 31, 2012
Current Exercise Price (in Dollars per Item)	3.00	5.00	1.60	1.60	1.60	5.00	2.00	0.0094	5.00
Number of Warrants	4,312,500	1,468,125	634,189	1,921,795	929,826	176,175	935,385
Total [Member]
Number of Warrants	10,377,995

Aggregate amount of each class of warrants or rights outstanding.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(i))

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph i

-Article 4

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