Common Stock (Details Textual) (USD $)	1 Months Ended	9 Months Ended
	Jan. 31, 2013	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Stock Issued During Period, Shares, New Issues	1,725,000
Sale Of Stock, Price Per Share (in dollars per share)	$ 27.25
Proceeds From Issuance Of Common Stock (in dollars)	$ 45,000,000	$ 44,802,340	$ 35,042,235
Common Stock, Par or Stated Value Per Share		$ 0.0001		$ 0.0001
Common Stock, Shares Authorized		28,000,000		15,850,000
Preferred Stock, Par or Stated Value Per Share		$ 0.0001		$ 0.0001
Preferred Stock, Shares Authorized		4,000,000		150,000
Excess Stock Par Or Stated Value Per Share		$ 0.0001		$ 0.0001
Excess Stock, Shares Authorized		8,000,000		4,000,000
Shares Authorized		40,000,000
Series A Junior Participating Preferred Stock [Member]
Preferred Stock, Par or Stated Value Per Share		$ 0.0001		$ 0.0001
Preferred Stock, Shares Authorized		200,000		150,000
Over Allotment Option [Member]
Sale of Stock, Number of Shares Issued in Transaction	225,000