Stock Incentive Plans (Details Textual) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Stock Incentive Plan (Additional Textual) [Abstract]
Eligible working hours for ESPP per week	0 days 20 hours
Eligible working months for ESPP	5 months
Maximum purchase amount of common stock per individual per calendar year	$ 25
Maximum common stock ownership for participation in ESSP	5.00%
Maximum number of shares that an individual employee can purchase during six month offering	10
Common stock issued, shares	1,017
Remaining common stock shares	33
Maximum [Member]
Stock Incentive Plan (Textual) [Abstract]
Periodic payroll deduction maximum for acquisition of common stock	15.00%
Minimum [Member]
Stock Incentive Plan (Textual) [Abstract]
Periodic payroll deduction multiple for acquisition of common stock	1.00%
1999 ESPP [Member]
Stock Incentive Plan (Textual) [Abstract]
Company reserved common stock for issuance	1,050
2012 ESPP [Member]
Stock Incentive Plan (Textual) [Abstract]
Company reserved common stock for issuance	1,500