Shareholders' Equity (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Common stock issued in secondary offering, net, shares			798,000
Common stock offering, price per share			$ 12.25
Net proceeds from of common stock offering			$ 8,818,000
Shares available for grant	148,940
Options outstanding, weighted average remaining contractual term	5 years 7 months 6 days
Options outstanding, aggregate intrinsic value	13,000
Options exercisable, weighted average remaining contractual term	3 years 8 months 12 days
Options exercisable, aggregate intrinsic value	3,000
Total intrinsic value of stock options exercised	208,000	211,000	352,000
Number of shares granted	159,750	156,000	85,000
Weighted average grant date fair value of options	$ 1.82	$ 3.35	$ 3.79
Total unrecognized compensation cost related to non-vested stock options	$ 447,000
Weighted average period over which compensation cost is expected to be recognized	2 years 9 months 18 days
Minimum [Member]
Stock option awards, vesting term	3 years
Stock option awards, contractual term	6 years
Maximum [Member]
Stock option awards, vesting term	5 years
Stock option awards, contractual term	10 years