Stock-Based Compensation (Details) (USD $)	3 Months Ended
	Mar. 31, 2013
Director group [Member]
Summary of stock option grants
Grantee Type	Director group
No. of Options Granted	7,122
Vesting Period	1 year or less
Weighted Average Exercise Price	$ 6.83
Weighted Average Grant Date Fair Value	$ 2.35
Director Group 1 [Member]
Summary of stock option grants
Grantee Type	Director group
No. of Options Granted	17,092
Vesting Period	3 years
Weighted Average Exercise Price	$ 6.83
Weighted Average Grant Date Fair Value	$ 3.76
Employee [Member]
Summary of stock option grants
Grantee Type	Employee
No. of Options Granted	5,000
Vesting Period	3 years
Weighted Average Exercise Price	$ 6.83
Weighted Average Grant Date Fair Value	$ 3.65
Employee inducement (1) [Member]
Summary of stock option grants
Grantee Type	Employee inducement (1)
No. of Options Granted	20,000
Vesting Period	3 years
Weighted Average Exercise Price	$ 7.14
Weighted Average Grant Date Fair Value	$ 3.81