Stock-Based Compensation (Details 1) (USD $)	6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013
Director group [Member]
Summary of nonvested stock awards granted
Vesting Period	1 year
Employee [Member]
Summary of nonvested stock awards granted
Vesting Period	3 years
2008 Equity Incentive Plan [Member] | Director group [Member]
Summary of nonvested stock awards granted
Vesting Period	1 year or less		1 year or less
Weighted Average Grant Date Fair Value (usd per share)	$ 1.89		$ 2.00
2008 Equity Incentive Plan [Member] | Director Group 1 [Member]
Summary of nonvested stock awards granted
Vesting Period			3 years
Weighted Average Grant Date Fair Value (usd per share)			$ 3.76
2008 Equity Incentive Plan [Member] | Employee [Member]
Summary of nonvested stock awards granted
Vesting Period	3 years	[1]	3 years
Weighted Average Grant Date Fair Value (usd per share)	$ 1.81	[1]	$ 2.44
2008 Equity Incentive Plan [Member] | Employee inducement [Member]
Summary of nonvested stock awards granted
Vesting Period			3 years	[2]
Weighted Average Grant Date Fair Value (usd per share)			$ 3.81	[2]
Restricted Stock and Restricted Stock Units [Member]
Summary of nonvested stock awards granted
No. of Shares Granted (shares)	0
Restricted Stock and Restricted Stock Units [Member] | 2008 Equity Incentive Plan [Member] | Director group [Member]
Summary of nonvested stock awards granted
Grantee Type	Director group		Director group
No. of Shares Granted (shares)	51,276		75,490
Vesting Period	1 year or less		1 year or less
Weighted Average Grant Date Fair Value (usd per share)	$ 6.45		$ 5.67
Restricted Stock and Restricted Stock Units [Member] | 2008 Equity Incentive Plan [Member] | Director Group 1 [Member]
Summary of nonvested stock awards granted
Grantee Type			Director group
No. of Shares Granted (shares)			17,092
Vesting Period			3 years
Weighted Average Grant Date Fair Value (usd per share)			$ 6.83
Restricted Stock and Restricted Stock Units [Member] | 2008 Equity Incentive Plan [Member] | Employee [Member]
Summary of nonvested stock awards granted
Grantee Type	Employee group		Employee group
No. of Shares Granted (shares)	120,000		438,625
Vesting Period	3 years		3 years
Weighted Average Grant Date Fair Value (usd per share)	$ 6.36		$ 5.56
Restricted Stock and Restricted Stock Units [Member] | 2008 Equity Incentive Plan [Member] | Employee inducement [Member]
Summary of nonvested stock awards granted
Grantee Type			Employee inducement (1)	[3]
No. of Shares Granted (shares)			20,000	[3]
Vesting Period			3 years	[3]
Weighted Average Grant Date Fair Value (usd per share)			$ 7.14	[3]

[1] (1)The exercise price for these options is $6.36 for the options that vest on June 27, 2015, $6.99 for the options that vest on June 27, 2016 and $7.63 for the options that vest on June 27, 2017.

[2] (2)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.

[3] (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.