Stockholders' Equity (Details) - USD ($)						3 Months Ended	9 Months Ended
	Mar. 22, 2018	Jan. 12, 2018	Sep. 19, 2017	Jun. 27, 2017	May 10, 2017	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction	2,743,640	4,000,000			2,584,085
Sale of stock, price per share	$ 1.10	$ 1.00
Exercise price of warrants							$ 2.76
Net proceeds from issuance of common stock and warrants	$ 2,800,000	$ 3,400,000			$ 9,400,000
Offering costs					$ 1,200,000
Proceeds from equity offerings, gross	$ 3,000,000	$ 4,000,000
Warrants exercised during period							217,400
Proceeds from exercises of warrants							$ 198,000	$ 31,000
Warrants expired during the period							19,691
Common Stock Issuance Agreement [Member]
Class of Stock [Line Items]
Capital raised limit for Price Protection Obligation							$ 10,000,000
Shares issued per agreements				28,684
CSIA Second Issuance [Member]
Class of Stock [Line Items]
Shares issued per agreements			523,210
Value of common stock issued			$ 519,000
Share Price			$ 0.99
CSIA Second Issuance [Member] | General and administrative expense [Member]
Class of Stock [Line Items]
Charges related to common stock included in general and administrative expense						$ 111,000		$ 519,000
Pre-Funded Warrant [Member]
Class of Stock [Line Items]
Number of securities called by warrants					4,483,334
Sale of stock, price per share					$ 1.49
Number of shares called by each warrant					1
Exercise price of warrants					$ 0.01
Common Warrant [Member]
Class of Stock [Line Items]
Number of securities called by warrants					8,000,000
Sale of stock, price per share					$ 1.50
Exercise price of warrants					$ 1.50
Expiration term of warrants (in years)					5 years