Note 9 - Stock Warrants (Details) - Stock Warrants (USD $)	3 Months Ended
Jun. 30, 2014	Jun. 30, 2013
Stock Warrants [Abstract]
Beginning balance	354,546	782,259
Beginning balance	$ 1.21	$ 0.85
Stock warrants exercised	(270,546)	(427,713)
Stock warrants exercised	$ 1.21	$ 0.55
Ending balance	84,000	354,546
Ending balance	$ 1.21	$ 1.21

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.

Reference 1: 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)(2))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph i

-Subparagraph 2

-Article 4

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