Stockholders' Equity (Details 1) (Stock Options [Member], USD $)	12 Months Ended
	Dec. 31, 2012
Range of Exercise Prices, Lower Range Limit (in dollars per share)	$ 1.20
Range of Exercise Prices, Upper Range Limit (in dollars per share)	$ 8.68
Number Options Outstanding	1,313,500
Options Outstanding, Weighted Avg. Remaining Life	3 years 1 month 20 days
Options Outstanding, Weighted Avg. Exercise Price (in dollars per share)	$ 3.94
Number Options Exercisable	542,375
Options Exercisable, Weighted Avg. Remaining Life	1 year 11 months 12 days
Options Exercisable, Weighted Avg. Exercise Price (in dollars per share)	$ 7.79
Exercise Price Range One [Member]
Range of Exercise Prices, Lower Range Limit (in dollars per share)	$ 1.20
Range of Exercise Prices, Upper Range Limit (in dollars per share)	$ 1.32
Number Options Outstanding	767,000
Options Outstanding, Weighted Avg. Remaining Life	4 years
Options Outstanding, Weighted Avg. Exercise Price (in dollars per share)	$ 1.21
Number Options Exercisable	0
Options Exercisable, Weighted Avg. Remaining Life	0 years
Options Exercisable, Weighted Avg. Exercise Price (in dollars per share)	$ 0
Exercise Price Range Two [Member]
Range of Exercise Prices, Lower Range Limit (in dollars per share)	$ 5.28
Range of Exercise Prices, Upper Range Limit (in dollars per share)	$ 5.50
Number Options Outstanding	41,500
Options Outstanding, Weighted Avg. Remaining Life	8 months 12 days
Options Outstanding, Weighted Avg. Exercise Price (in dollars per share)	$ 5.41
Number Options Exercisable	37,375
Options Exercisable, Weighted Avg. Remaining Life	8 months 12 days
Options Exercisable, Weighted Avg. Exercise Price (in dollars per share)	$ 5.43
Exercise Price Range Three [Member]
Range of Exercise Prices (in dollars per share)	$ 7.92
Number Options Outstanding	475,000
Options Outstanding, Weighted Avg. Remaining Life	2 years
Options Outstanding, Weighted Avg. Exercise Price (in dollars per share)	$ 7.92
Number Options Exercisable	475,000
Options Exercisable, Weighted Avg. Remaining Life	2 years
Options Exercisable, Weighted Avg. Exercise Price (in dollars per share)	$ 7.92
Exercise Price Range Four [Member]
Range of Exercise Prices (in dollars per share)	$ 8.68
Number Options Outstanding	30,000
Options Outstanding, Weighted Avg. Remaining Life	2 years 9 months 14 days
Options Outstanding, Weighted Avg. Exercise Price (in dollars per share)	$ 8.68
Number Options Exercisable	30,000
Options Exercisable, Weighted Avg. Remaining Life	2 years 9 months 14 days
Options Exercisable, Weighted Avg. Exercise Price (in dollars per share)	$ 8.68