Note 3 - Stock-Based Compensation (Detail) - Restricted Stock Award Forfeitures (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended	3 Months Ended
Sep. 30, 2012	Sep. 30, 2013 Scenario, Forecast [Member] Restricted Stock [Member]	Sep. 30, 2012 Restricted Stock [Member]	Sep. 30, 2011 Restricted Stock [Member]
Restricted Stock Award Forfeitures		June 30, 2011	June 30, 2011	June 30, 2010
Restricted Stock Award Forfeitures	(18,448)	15,000	8,000	9,000
Restricted Stock Award Forfeitures (in Dollars)		$ 101	$ 66	$ 70
Restricted Stock Award Forfeitures		April 1, 2013	April 1, 2012	April 1, 2011

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(f)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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