Note 9 - Industry Segments (Details) - Industry Segments - Asset Information (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	$ 10,610	$ 9,936
Information Technology [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	1,710	1,712
Industrial Products [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	6,905	6,250
Operating Segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	8,615	7,962
Corporate Segment [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	$ 1,995	$ 1,974