Stock-Based Compensation (Details 1) (USD $)	3 Months Ended				9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended			9 Months Ended		3 Months Ended				9 Months Ended
	Sep. 30, 2012 Restricted Stock and Restricted Stock Units [Member]	Sep. 30, 2013 Director group [Member]	Sep. 30, 2012 Director group [Member]	Sep. 30, 2012 Director group [Member] 2008 Equity Incentive Plan [Member] Restricted Stock and Restricted Stock Units [Member]	Sep. 30, 2013 Director group [Member] 2008 Equity Incentive Plan [Member] Restricted Stock and Restricted Stock Units [Member]	Sep. 30, 2012 Director group [Member] 2008 Equity Incentive Plan [Member] Restricted Stock and Restricted Stock Units [Member]	Sep. 30, 2013 Director Group 1 [Member]	Sep. 30, 2013 Director Group 1 [Member] 2008 Equity Incentive Plan [Member] Restricted Stock and Restricted Stock Units [Member]	Sep. 30, 2013 Employee [Member]	Sep. 30, 2012 Employee [Member]	Sep. 30, 2012 Employee [Member] 2008 Equity Incentive Plan [Member] Restricted Stock and Restricted Stock Units [Member]	Sep. 30, 2013 Employee [Member] 2008 Equity Incentive Plan [Member] Restricted Stock and Restricted Stock Units [Member]	Sep. 30, 2012 Employee [Member] 2008 Equity Incentive Plan [Member] Restricted Stock and Restricted Stock Units [Member]	Sep. 30, 2013 Employee inducement (1) [Member]		Sep. 30, 2012 Employee inducement (1) [Member]		Sep. 30, 2013 Employee inducement (1) [Member] 2008 Equity Incentive Plan [Member] Restricted Stock and Restricted Stock Units [Member]		Sep. 30, 2012 Employee inducement (1) [Member] 2008 Equity Incentive Plan [Member] Restricted Stock and Restricted Stock Units [Member]
Summary of nonvested stock awards granted
Grantee Type					Director group	Director group		Director group				Employee group	Employee group					Employee inducement (1)		Employee inducement (2)
No. of Shares Granted (shares)	0				75,490	51,276		17,092			597,250	449,875	426,286					20,000	[1]	45,000	[2]
Vesting Period		1 year or less	1 year or less		1 year or less	1 year or less
Vesting Period			1 year				3 years	3 years	3 years	3 years		3 years	3 years	3 years	[3]	3 years	[4]	3 years	[1]	3 years	[2]
Weighted Average Grant Date Fair Value (usd per share)		$ 2.00		$ 3.97	$ 5.67	$ 7.53	$ 3.76	$ 6.83	$ 2.44		$ 4.12	$ 5.58	$ 7.55	$ 3.81	[3]	$ 4.58	[4]	$ 7.14	[1]	$ 8.54	[2]

[1] The Company granted nonvested performance-based stock awards (restricted stock) outside its existing stock-based compensation plans in the first quarter of 2013 to one employee in connection with the employee joining the Company.

[2] The Company granted nonvested stock awards (restricted stock units) outside its existing stock-based compensation plans in the third quarter of 2012 to one employee in connection with the employee joining the Company.

[3] The Company granted non-qualified performance-based stock options outside its existing stock-based compensation plans in the first quarter of 2013 to one employee in connection with the employee joining the Company.

[4] The Company granted non-qualified stock options outside its existing stock-based compensation plans in the third quarter of 2012 to one employee in connection with the employee joining the Company.