Stock Based Employee Compensation (Details 2) (USD $)	6 Months Ended
	Jun. 30, 2012
Stock options [Member]
Outstanding stock options
Exercise Price	$ 1.585
Shares, Outstanding	150,000
Weighted-Average Life (Years), Outstanding	4 months 28 days
Intrinsic Values Outstanding, at stock option plan exercise price	$ 977,000
Weighted-Average Exercise Price, Exercisable	$ 1.585
Shares, Exercisable	150,000
Intrinsic Values Exercisable, at stock option plan exercise price	977,000
Stock Options Two [Member]
Outstanding stock options
Exercise Price	$ 2.300
Shares, Outstanding	258,723
Weighted-Average Life (Years), Outstanding	6 years 8 months 1 day
Intrinsic Values Outstanding, at stock option plan exercise price	1,501,000
Weighted-Average Exercise Price, Exercisable	$ 2.300
Shares, Exercisable	129,362
Intrinsic Values Exercisable, at stock option plan exercise price	750,000
Stock Options Three [Member]
Outstanding stock options
Exercise Price	$ 5.770
Shares, Outstanding	31,923
Weighted-Average Life (Years), Outstanding	4 years 8 months 1 day
Intrinsic Values Outstanding, at stock option plan exercise price	74,000
Weighted-Average Exercise Price, Exercisable	$ 5.770
Shares, Exercisable	31,923
Intrinsic Values Exercisable, at stock option plan exercise price	74,000
Stock Options Four [Member]
Outstanding stock options
Exercise Price	$ 5.850
Shares, Outstanding	142,382
Weighted-Average Life (Years), Outstanding	5 years 6 months 29 days
Intrinsic Values Outstanding, at stock option plan exercise price	320,000
Weighted-Average Exercise Price, Exercisable	$ 5.850
Shares, Exercisable	106,787
Intrinsic Values Exercisable, at stock option plan exercise price	240,000
Stock Options Five [Member]
Outstanding stock options
Shares, Outstanding	583,028
Weighted-Average Life (Years), Outstanding	4 years 8 months 5 days
Intrinsic Values Outstanding, at stock option plan exercise price	2,872,000
Weighted-Average Exercise Price, Exercisable	$ 3.220
Shares, Exercisable	418,072
Intrinsic Values Exercisable, at stock option plan exercise price	$ 2,041,000