XML 93 R64.htm IDEA: XBRL DOCUMENT v3.10.0.1
SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]                      
Revenues $ 375 $ 165 $ 208 $ 318 $ 191 $ 163 $ 174 $ 537 $ 1,066 $ 1,065 $ 6,162
Operating expenses 9,964 6,970 7,450 7,755 7,977 7,407 6,905 8,031 32,139 30,320 36,808
Net loss $ (7,300) $ (5,597) $ (6,934) $ (7,186) $ (7,429) $ (6,899) $ (6,405) $ (7,183) $ (27,017) $ (27,916) $ (29,537)
Basic and diluted net loss per share $ (0.04) $ (0.03) $ (0.04) $ (0.04) $ (0.05) $ (0.04) $ (0.04) $ (0.05) $ (0.15) $ (0.18) $ (0.19)