Organization and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Organization and Summary of Significant Accounting Policies [Abstract]

Summary of fair value of Share-Based Compensation stock options

	Years Ended December 31,
	2012	2011	2010
Assumptions:
Assumed risk-free interest rate	0.80%	1.90%	2.44%
Assumed volatility	72%	68%	66%
Average expected option life	4.5 years	4.5 years	4.5 years
Expected dividend yield	—	—	—