XML 40 R63.htm IDEA: XBRL DOCUMENT v3.19.3
Net Income (Loss) Per Share - Additional Information (Detail)
3 Months Ended 9 Months Ended
Feb. 28, 2019
Mar. 31, 2019
Sep. 30, 2019
Business Acquisition [Line Items]      
Reverse stock split   0.067  
BRMR and Everest Merger Sub Inc. [Member] | Common Stock [Member]      
Business Acquisition [Line Items]      
Reverse stock split, description     15-to-1
Reverse stock split 0.067