The specified number of securities that each class of warrants or rights outstanding give the holder the right but not the obligation to purchase from the issuer at a specific price, on or before a certain date.

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=6881521&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

Note 9 - Stock Warrants (Detail) (USD $)	Mar. 31, 2013	Feb. 08, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011	Dec. 08, 2010	Dec. 12, 2005	Mar. 31, 2003 Warrants Issued in Connection with Private Placement Offering [Member]	Feb. 28, 2013 Warrant Issued in Connection with Credit Agreement [Member]	Dec. 08, 2010 First Placement Agent [Member]	Dec. 08, 2010 Second Placement Agent [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	354,546	427,713	782,259	1,235,877	1,235,877			387,201		338,182	16,364
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)	1.21	0.55	0.85	0.35	0.35	1.21		0.01
Number of Years							10 years		10 years
Warrants Issued, Fair Value Disclosure (in Dollars)		$ 209,000