Equity - Issue and Conversion (Details) - USD ($)	1 Months Ended	3 Months Ended
	Dec. 31, 2016	Mar. 31, 2017
Proceeds from issuance of common stock, net of issuance costs		$ 449,000
ATM Agreement
Aggregate value of securities allowed under agreement	$ 5,000,000
Aggregate securities allowed under agreement (in shares)	10,000,000
Common stock issued (in shares)		640,000
Sale price (in dollars per shares)		$ 0.74
Gross proceeds from common stock sale		$ 475,000
Commission payment		$ 11,000
Commission rate (as a percent)	2.00%	2.20%
Amortization of deferred cost		$ 15,000
Proceeds from issuance of common stock, net of issuance costs		449,000
Equity issue costs		$ 14,000