Stock-Based Compensation (Details) (USD $)	9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013
Director group [Member] | Equity Incentive Plan Year [Member]
Summary of stock option grants
Grantee Type	Director group		Director group
No. of Options Granted (shares)	51,276		75,490
Vesting Period	1 year or less		1 year or less
Weighted Average Exercise Price (usd per share)	$ 6.45		$ 5.67
Weighted Average Grant Date Fair Value (usd per share)	$ 1.89		$ 2.00
Director Group 1 [Member] | Equity Incentive Plan Year [Member]
Summary of stock option grants
Grantee Type			Director group
No. of Options Granted (shares)			17,092
Vesting Period			3 years
Weighted Average Exercise Price (usd per share)			$ 6.83
Weighted Average Grant Date Fair Value (usd per share)			$ 3.76
Employee [Member] | Equity Incentive Plan Year [Member]
Summary of stock option grants
Grantee Type	Employee group (1)	[1]	Employee group
No. of Options Granted (shares)	1,480,000	[1]	449,875
Vesting Period	3 years	[1]	3 years
Weighted Average Exercise Price (usd per share)	$ 6.99	[1]	$ 5.58
Weighted Average Grant Date Fair Value (usd per share)	$ 1.81	[1]	$ 2.44
Employee [Member] | Equity Incentive Plan Year [Member] | Year One [Member]
Summary of stock option grants
Weighted Average Exercise Price (usd per share)	$ 6.36	[1]
Employee [Member] | Equity Incentive Plan Year [Member] | Year Two [Member]
Summary of stock option grants
Weighted Average Exercise Price (usd per share)	$ 6.99	[1]
Employee [Member] | Equity Incentive Plan Year [Member] | Year Three [Member]
Summary of stock option grants
Weighted Average Exercise Price (usd per share)	$ 7.63	[1]
Employee [Member] | Employee Inducement [Member] | Year One [Member]
Summary of stock option grants
Weighted Average Exercise Price (usd per share)	$ 6.04	[2]
Employee [Member] | Employee Inducement [Member] | Year Two [Member]
Summary of stock option grants
Weighted Average Exercise Price (usd per share)	$ 6.64	[2]
Employee [Member] | Employee Inducement [Member] | Year Three [Member]
Summary of stock option grants
Weighted Average Exercise Price (usd per share)	$ 7.24	[2]
Employee inducement [Member] | Equity Incentive Plan Year [Member]
Summary of stock option grants
Grantee Type	Employee inducement (2)	[2]	Employee inducement (3)	[3]
No. of Options Granted (shares)	270,000	[2]	20,000	[3]
Vesting Period	3 years	[2]	3 years	[3]
Weighted Average Exercise Price (usd per share)	$ 6.64	[2]	$ 7.14	[3]
Weighted Average Grant Date Fair Value (usd per share)	$ 1.71	[2]	$ 3.81	[3]

[1] The weighted average exercise price for these options is calculated based on an exercise price of $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] The Company granted non-qualified stock options outside its existing stock-based compensation plans in the third quarter of 2014 to two executive officers in connection with the employees joining the Company. The weighted average exercise price for these options is calculated based on an exercise price of $6.04 for the options that vest on September 11, 2015, $6.64 for the options that vest on

[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.