Note 8 - Industry Segments (Details) - Industry Segments - Asset Information (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	$ 10,146	$ 9,936
Information Technology [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	1,560	1,712
Industrial Products [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	6,643	6,250
Operating Segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	8,203	7,962
Corporate Segment [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	$ 1,943	$ 1,974