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Summary of Changes in Carrying Amount of Goodwill (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract]    
Balance as of December 31, 2019 $ 32,330 $ 32,330
Adjustment to goodwill [1]   (84)
Impairment of goodwill $ (14,700) (14,688) [2]
Balance as of December 31, 2020   $ 17,558
[1]

(1) Included working capital adjustments finalized subsequent to the Sonar acquisition in December 2019, resulting in total consideration of approximately $13.2 million and an adjustment to goodwill in the amount of $84,000 during the year ended December 31, 2020.
[2]

(2) The impairment is recorded on the Company's Consolidated Statement of Operations within Impairment of goodwill.