Stock-Based Compensation - Summary of Common Stock Option Activity (Details) - Jun. 30, 2015 - $ / shares	Total
Number of Shares
Options outstanding at December 31, 2014 (shares)	846,874
Options granted (shares)	0
Options forfeited (shares)	0
Options outstanding at June 30, 2015 (shares)	846,874
Options exercisable at June 30, 2015 (shares)	24,717
Weighted-Average Exercise Price per share
Options outstanding at December 31, 2014 (in dollars per share)	$ 11.00
Options granted (in dollars per share)	0.00
Options forfeited (in dollars per share)	0.00
Options outstanding at June 30, 2015 (in dollars per share)	11.00
Options exercisable at June 30, 2015 (in dollars per share)	$ 11.00