Subsequent Event (Details) - USD ($) shares in Millions		1 Months Ended	3 Months Ended
	May 03, 2017	Apr. 30, 2017	Mar. 31, 2017	Mar. 31, 2016
Subsequent Event [Line Items]
Proceeds from exercise of warrants			$ 0	$ 183,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Net proceeds received from the sale of common stock	$ 13,900,000
Issuance of common stock (in shares)	30
Proceeds from exercise of warrants		$ 1,900,000