Stockholders' Equity - Warrants (Details) - $ / shares	Jun. 30, 2016	Dec. 31, 2015
Class of Warrant or Right [Line Items]
Warrants outstanding	272,468	272,468
$1.30 per share
Class of Warrant or Right [Line Items]
Warrants outstanding	230,409	230,409
Exercise price of warrants (in dollars per share)	$ 1.30	$ 1.30
$5.94 per share
Class of Warrant or Right [Line Items]
Warrants outstanding	42,059	42,059
Exercise price of warrants (in dollars per share)	$ 5.94	$ 5.94