Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements Narrative (Details)

v3.10.0.1
Fair Value Measurements Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Mar. 31, 2018
Jan. 12, 2018
Oct. 21, 2016
Fair Value Disclosures [Abstract]              
Warrant shares (in shares)         1,239,286 925,000 314,286
Warrant, exercise price (in dollars per share)           $ 1.96 $ 2.80
Change in fair value of warrant liability $ (278,000) $ 11,000 $ 109,000 $ (67,000)