Stockholders' Equity (Details 2) (Warrant [Member])	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Warrant [Member]
Expected warrant life (years)	3 years	3 years
Risk-free weighted average interest rate	0.37%	0.37%
Stock price volatility	46.40%	50.90%
Dividend yield	1.60%	1.60%