Organization and Summary of Significant Accounting Policies (Details 3)	6 Months Ended
	Jun. 30, 2012
Stock options | Minimum
Stock Options and Stock-Based Compensation
Requisite period of the award over which stock based compensation award expenses are recognized (in years)	5 years
Stock options | Maximum
Stock Options and Stock-Based Compensation
Requisite period of the award over which stock based compensation award expenses are recognized (in years)	10 years
Restricted stock | Minimum
Stock Options and Stock-Based Compensation
Requisite period of the award over which stock based compensation award expenses are recognized (in years)	1 year
Restricted stock | Maximum
Stock Options and Stock-Based Compensation
Requisite period of the award over which stock based compensation award expenses are recognized (in years)	3 years