Stockholders' Equity (Deficit) (Details) - USD ($)		3 Months Ended
	Mar. 16, 2015	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Class of Stock [Line Items]
Exercise price of warrants		$ 9.34		$ 8.96
Warrant liability		$ 2,000		$ 6,000
Increase (decrease) to additional paid in capital resulting from warrants issued		$ 204,000
Decrease to additional paid-in capital resulting from warrants issued			$ (3,996,000)
Other expenses related to issuance of warrants			213,000
Placement Agent [Member]
Class of Stock [Line Items]
Number of securities called by warrants	94,545
Exercise price of warrants	$ 10.75
Fees paid to placement agent	$ 833,000
Other expenses related to issuance of warrants			$ 218,000
Private Placement [Member]
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction	1,575,758
Sale of stock, price per share	$ 8.25
Proceeds from issuance of private placement, gross	$ 13,000,000
Number of securities called by warrants	393,939
Exercise price of warrants	$ 10.75
Warrant liability	$ 4,210,000