Annual report pursuant to Section 13 and 15(d)

Quarterly Financial Information - Quarterly Financial Information (Detail)

v3.8.0.1
Quarterly Financial Information - Quarterly Financial Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 8 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]                        
Research and development $ 2,153 $ 825 $ 62 $ 61 $ 80 $ 69 $ 72 $ 65 $ 107 $ 3,101 $ 286  
General and administrative 1,629 1,546 96 260 529 329 281 289 1,116 3,531 1,428  
Total operating expenses 3,782 2,371 158 321 609 398 353 354 1,223 6,632 1,714  
Other income 42 (7,025) (11) (8) (4) (7) (7) (6) (12) (7,002) (24)  
Recovery of deferred income taxes [note 5]   2,927   124 127 137 122 118 407 3,051 504 $ 407
Net Loss $ (3,740) $ (6,469) $ (169) $ (205) $ (486) $ (268) $ (238) $ (242) $ (828) $ (10,583) $ (1,234) $ (828)
Basic and diluted net loss per common share $ (0.32) $ (0.90) $ (7.96) $ (9.66) $ (22.89) $ (12.62) $ (11.21) $ (11.40) $ (39.00) $ (2.21) $ (58.13) $ (39.00)