Stock Compensation (Details 1)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Fair values of stock options granted
Expected dividend yield	0.00%	0.00%	0.00%	0.00%
Expected lives	5 years 3 months 18 days		5 years 3 months 18 days
Maximum [Member]
Fair values of stock options granted
Risk-free interest rate	1.10%	2.40%	1.10%	2.40%
Expected lives		5 years 6 months		5 years 6 months
Expected volatility	82.50%	81.60%	82.50%	81.60%
Minimum [Member]
Fair values of stock options granted
Risk-free interest rate	0.80%	1.90%	0.80%	1.90%
Expected lives		5 years 4 months 24 days		5 years 4 months 24 days
Expected volatility	79.70%	80.90%	79.70%	80.90%