Stock-Based Compensation (Details Textual) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Stock Based Compensation (Textual) [Abstract]
Six months offering period end date	Sep. 30, 2012		Sep. 30, 2012
Stock-based compensation			$ 3,052,000	$ 5,131,000
Stock Based Compensation (Additional Textual) [Abstract]
Shares of restricted stock granted value	2,600,000		2,600,000
Six months offering period end date	Sep. 30, 2012		Sep. 30, 2012
Maximum [Member]
Stock Based Compensation (Textual) [Abstract]
Amortized period of cost of restricted stock granted			48 months
Minimum [Member]
Stock Based Compensation (Textual) [Abstract]
Amortized period of cost of restricted stock granted			12 months
2005 Stock Option [Member]
Stock Based Compensation (Textual) [Abstract]
Number of shares available for future grants	3,100,000		3,100,000
Employee Stock Purchase Plan [Member]
Stock Based Compensation (Textual) [Abstract]
Percentage of market value			85.00%
Percentage of employee's payroll deductions limited to employee's compensation			10.00%
Maximum Stock value of shares purchased by employees if one thousand shares purchased			25,000
Maximum number of shares that employee can purchase each year			1,000
Maximum number of shares available for issuance under plan	1,000,000		1,000,000
Shares purchased/granted			8,052
Shares purchased/granted at a fair value			$ 0.93
Stock Options [Member]
Stock Based Compensation (Textual) [Abstract]
Stock options granted			20,000
Restricted Stock [Member]
Stock Based Compensation (Textual) [Abstract]
Stock options granted			1,000,000
Stock-based compensation	$ 100,000	$ 100,000	$ 300,000	$ 1,400,000