Note 9 - Derivative Financial Instruments (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	6 Months Ended		3 Months Ended
Sep. 30, 2012	Jul. 01, 2012	Apr. 01, 2012	Jul. 01, 2012	Dec. 31, 2011 Warrants 2008 [Member]	Apr. 01, 2012 Warrants 2008, First Quarter Exercise [Member]	Jul. 01, 2012 Warrants 2008, Second Quarter Exercise [Member]	Sep. 30, 2012 Warrants 2008, Third Quarter Exercise [Member]
Note 9 - Derivative Financial Instruments (Details) [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights					328,169	179,531	74,319	74,319
Net Stock Issued During Period, Shares, Warrants Exercised	68,641	69,106	154,109
Adjustments To Additional Paid In Capital, Warrant Exercised (in Dollars)				$ 2,096		$ 1,100	$ 1,000	$ 800

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