Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Details)

Stockholders' Equity (Details) - Series A Preferred Stock - $ / shares
Oct. 08, 2015
Dec. 15, 2008
Equity, Class of Treasury Stock [Line Items]    
Preferred stock, par value per share   $ 0.01
Class of warrant or right, number of securities called by warrants or rights (in shares)   0.001
Class of warrant or right, exercise price (usd per share)   $ 51.60
Expiration period   10 years
Common stock ownership threshold   15.00%
Collective ownership threshold for joint filers 19.90%