Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements Narrative (Details)

v3.10.0.1
Fair Value Measurements Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Aug. 31, 2018
Jan. 12, 2018
Oct. 21, 2016
Fair Value Disclosures [Abstract]              
Warrant shares (in shares) 1,239,286   1,239,286   100,000 925,000 314,286
Warrant, exercise price (in dollars per share)         $ 2.43 $ 1.96 $ 2.80
Change in fair value of warrant liability $ (401) $ 15 $ (292) $ (52)