Stock Options and Shareholder Rights Plans (Details) (USD $)	12 Months Ended				12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Feb. 11, 2003	Feb. 11, 2003 Minimum	Dec. 31, 2012 Stock options	Dec. 31, 2011 Stock options	Sep. 19, 2008 Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options authorized							500,000
Vesting period					3 years
Stock option expense (in dollars)					$ 0	$ 17,000
Instrinsic value of options outstanding (in dollars)	153,000
Instrinsic value of options exercisable (in dollars)	$ 153,000
Weighted Average Exercise Price
Beginning balance (in dollars per share)	$ 1.82	$ 1.62
Granted (in dollars per share)	$ 0.00	$ 0.00
Forfeited (in dollars per share)	$ 0.00	$ 1.39
Exercised (in dollars per share)	$ 0.00	$ 0.83
Vested (in dollars per share)	$ 0.00	$ 1.21
Ending balance (in dollars per share)	$ 1.82	$ 1.82
Options Outstanding
Beginning balance	425,965	587,965
Granted	0	0
Forfeited	0	(40,000)
Exercised	0	(122,000)
Vested	0	0
Ending balance	425,965	425,965
Vested and Exercisable
Beginning balance	425,965	549,824
Granted	0	0
Forfeited	0	(40,000)
Exercised	0	(122,000)
Vested	0	38,141
Ending balance	425,965	425,965
Number of shares called by each Right			0.001
Exercise price (in dollars per Right)			8.00
Ownership percentage triggering exercisability				15.00%
Exercise price, multiplier under certain conditions			2
Ownership percentage triggering ability to extinguish				50.00%
Number of shares called by each Right upon extinguishment			1
Redemption price (in dollars per Right)			0.001