Stockholders' Equity (Deficit) (Details) - USD ($)		1 Months Ended	3 Months Ended
	Nov. 22, 2016	May 31, 2016	Mar. 31, 2017	Dec. 31, 2016	Nov. 30, 2016
Class of Stock [Line Items]
Exercise price of warrants			$ 22.86
Derivative liability			$ 2,329,000	$ 2,443,000
Changes in estimated fair value			$ (114,000)
Common stock issued during period			0
Securities Purchase Agreement [Member]
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction		212,766
Number of securities called by warrants		106,383
Number of shares called by each warrant		0.50
Sale of stock, price per share		$ 23.50
Proceeds from equity offerings, gross		$ 5,000,000
Exercise price of warrants		$ 22.50
Expiration term of warrants (in years)		5 years
Proceeds from issuance of common stock and warrants		$ 4,200,000
Derivative liability		$ 1,800,000	$ 245,000
Dividend yield		0.00%
Volatility		123.00%
Risk-free interest rate		1.23%
Value of common stock issued		$ 3,200,000
Costs directly allocable to offering		800,000
Payments of stock issuance costs allocable to warrants		$ 200,000
Changes in estimated fair value			(29,000)
Public Offering of Warrants and Common Stock [Member]
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction	533,500
Number of securities called by warrants	533,500
Number of shares called by each warrant	1
Sale of stock, price per share	$ 7.50				$ 7.50
Proceeds from equity offerings, gross	$ 4,000,000
Exercise price of warrants	$ 7.50
Expiration term of warrants (in years)	5 years
Proceeds from issuance of common stock and warrants	$ 3,300,000
Derivative liability	2,900,000		1,961,000
Value of common stock issued	1,100,000
Costs directly allocable to offering	700,000
Payments of stock issuance costs allocable to warrants	$ 300,000
Changes in estimated fair value			$ (82,000)