Changes in Shareholders' Equity (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Changes in Shareholders' Equity:
Stockholders Equity Beginning Balance			$ 72,989
Issuance of 6,261 common shares for stock options exercised, employee stock purchases and employee stock awards			86
Share-based compensation, options granted			65
Dividends:
Preferred stock, $5.00 per share			(3)
Common stock, $.12 per share			(581)
Net income for the period	(381)	1,582	1,819	326
Stockholders Equity Ending Balance	74,375		74,375
Preferred Stock [Member]
Changes in Shareholders' Equity:
Stockholders Equity Beginning Balance			32
Issuance of 6,261 common shares for stock options exercised, employee stock purchases and employee stock awards
Share-based compensation, options granted
Dividends:
Preferred stock, $5.00 per share
Common stock, $.12 per share
Net income for the period
Stockholders Equity Ending Balance	32		32
Common Stock [Member]
Changes in Shareholders' Equity:
Stockholders Equity Beginning Balance			2,417
Issuance of 6,261 common shares for stock options exercised, employee stock purchases and employee stock awards			3
Share-based compensation, options granted
Dividends:
Preferred stock, $5.00 per share
Common stock, $.12 per share
Net income for the period
Stockholders Equity Ending Balance	2,420		2,420
Additional Paid-in Capital [Member]
Changes in Shareholders' Equity:
Stockholders Equity Beginning Balance			37,271
Issuance of 6,261 common shares for stock options exercised, employee stock purchases and employee stock awards			83
Share-based compensation, options granted			65
Dividends:
Preferred stock, $5.00 per share
Common stock, $.12 per share
Net income for the period
Stockholders Equity Ending Balance	37,419		37,419
Retained Earning [Member]
Changes in Shareholders' Equity:
Stockholders Equity Beginning Balance			33,269
Issuance of 6,261 common shares for stock options exercised, employee stock purchases and employee stock awards
Share-based compensation, options granted
Dividends:
Preferred stock, $5.00 per share			(3)
Common stock, $.12 per share			(581)
Net income for the period			1,819
Stockholders Equity Ending Balance	$ 34,504		$ 34,504