Annual report pursuant to Section 13 and 15(d)

MERGER - Additional Information (Detail)

v3.19.3.a.u2
MERGER - Additional Information (Detail) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Feb. 10, 2017
Business Acquisition [Line Items]                        
Goodwill                       $ 77,592,000
Goodwill deductible for income tax purposes                       $ 0
Goodwill impairment                 $ 0 $ 0 $ 77,592,000  
Net loss $ (37,541,000) $ (39,607,000) $ (40,493,000) $ (34,126,000) $ (31,516,000) $ (33,191,000) $ (35,854,000) $ (25,184,000) $ (151,767,000) $ (125,745,000) (231,459,000)  
Parallax Services                        
Business Acquisition [Line Items]                        
Net loss                     $ 800,000