Stockholders' Equity (Details) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended
	Mar. 04, 2015	Mar. 31, 2015	Mar. 04, 2015 item
Stockholders' Equity
Number of shares of common stock issued in equity and public offering	14,375,000
Net proceeds from issue of shares of common stock in equity and public offering	$ 21,500	$ 21,479
Number of executive officers			2
Shares purchased by executive officers	406,250