Stock Compensation (Details Textual) (USD $)	1 Months Ended	3 Months Ended		6 Months Ended
	Apr. 30, 2012	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Stock Compensation (Textual) [Abstract]
Stock options granted under plan vest period	2 years
Common stock remain available for future grant under the 2011 Plan		2,124,838		2,124,838		2,417,659
weighted-average fair value per share of stock-based awards, granted to employees	$ 5.40	$ 3.53	$ 6.30	$ 4.56	$ 7.98
Grant date fair value of stock options that vested	$ 32,377			$ 2,689,000	$ 1,807,000
Unrecognized compensation cost related to nonvested share-based compensation arrangements granted, including stock options and restricted stock		5,529,000		5,529,000
Costs are expected to be recognized over a weighted-average period				3 years
Intrinsic value of stock options exercised				$ 280	$ 70,000
Stock Incentive, 2002 to December 2010 [Member]
Stock Compensation (Textual) [Abstract]
Stock options granted under plan vest period				3 years
Underlying shares vesting on each anniversary of grant				33.00%
Term of Award				10 years
Stock Incentive Plan, 2002 Beginning in January 2011 [Member]
Stock Compensation (Textual) [Abstract]
Stock options granted under plan vest period				4 years
Underlying shares vesting on the first anniversary of the grant				25.00%
Common stock remain available for future grant under the 2011 Plan		2,140,566		2,140,566