Subsequent Events - Narrative (Details) - USD ($)				1 Months Ended	12 Months Ended
	Jan. 26, 2018	Jan. 25, 2018	Oct. 24, 2017	Feb. 28, 2018	Dec. 31, 2017	Dec. 31, 2016	Mar. 07, 2018
Subsequent Event [Line Items]
Proceeds from issuance of preferred stock gross					$ 2,280,000	$ 0
Issuance of stock					$ 2,280,000	$ 204,000
Common Stock
Subsequent Event [Line Items]
Issuance of stock (in shares)						600,000
Stock issued for conversion of convertible preferred stock, shares (in shares)					8,392,857
Series B Preferred Stock
Subsequent Event [Line Items]
Proceeds from issuance of preferred stock gross			$ 2,800,000
Preferred stock, convertible, par value (in dollars per share)			$ 1,000		$ 0.0001	$ 0.0001
Stock issued during period, conversion of convertible securities, price (in dollars per share)			$ 0.28
Participation rights, future offerings, max percentage			100.00%
Participation rights, future offerings, period of time following closing date			24 months
Preferred stock, shares issued (in shares)					450	0
Preferred stock, shares outstanding (in shares)					450	0
Series B Preferred Stock | Preferred Stock
Subsequent Event [Line Items]
Issuance of stock (in shares)			2,800		2,800
Issuance of stock			$ 2,280,000
Stock issued for conversion of convertible preferred stock, shares (in shares)					(2,350)
Subsequent Event | Super G Loan
Subsequent Event [Line Items]
Repayments of debt	$ 1,269,000
Subsequent Event | Series C Preferred Stock
Subsequent Event [Line Items]
Proceeds from issuance of preferred stock gross		$ 1,750,000
Preferred stock, convertible, par value (in dollars per share)		$ 1,000
Stock issued during period, conversion of convertible securities, price (in dollars per share)		$ 0.30
Participation rights, future offerings, max percentage		100.00%
Participation rights, future offerings, period of time following closing date		24 months
Participation rights, future offerings, limitation on stated value outstanding		$ 500,000
Preferred stock, shares issued (in shares)							1,425
Preferred stock, shares outstanding (in shares)							1,425
Subsequent Event | Series C Preferred Stock | Preferred Stock
Subsequent Event [Line Items]
Issuance of stock (in shares)		1,750
Issuance of stock		$ 1,531,000
Stock issued for conversion of convertible preferred stock, shares (in shares)				(325)
Subsequent Event | Series C Preferred Stock | Common Stock
Subsequent Event [Line Items]
Stock issued for conversion of convertible preferred stock, shares (in shares)				1,083,333
Subsequent Event | Series B Preferred Stock
Subsequent Event [Line Items]
Preferred stock, shares issued (in shares)							400
Preferred stock, shares outstanding (in shares)							400
Subsequent Event | Series B Preferred Stock | Preferred Stock
Subsequent Event [Line Items]
Stock issued for conversion of convertible preferred stock, shares (in shares)				(50)
Subsequent Event | Series B Preferred Stock | Common Stock
Subsequent Event [Line Items]
Stock issued for conversion of convertible preferred stock, shares (in shares)				178,571