Income Taxes (Details 4) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of the beginning and ending amount of gross unrecognized tax benefits
Balance at the beginning of the period	$ 244,000	$ 217,000
Additions based on tax positions related to the current year	5,000	77,000
Reductions due to closing of statute of limitations	(14,000)	(9,000)
Reductions based on tax positions related to the prior year	(2,000)	(41,000)
Balance at the end of the period	233,000	244,000
Potential benefits that would affect the effective tax rate on income before income taxes if recognized	174,000
Total accrued interest and penalties	$ 33,000	$ 34,000