Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Receivables allowance for doubtful accounts (in Dollars)	$ 20	$ 12
Preferred stock, par value (in Dollars per share)	$ 10	$ 10
Preferred stock, shares authorized	1,000	1,000
Preferred stock, shares issued	437	437
Preferred stock, shares outstanding	437	437
Preferred stock, percentage non-cumulative	5.00%	5.00%
Common stock, par value (in Dollars per share)	$ 0	$ 0
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	18,115,965	18,115,965
Common stock, shares outstanding	17,851,535	17,934,233
Treasury stock, shares	264,430	181,732