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Other Assets - Current (Detail) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]    
US federal tax receivables   $ 1,115
Insurance receivable   15,000
Prepaid advertising $ 263 275
Prepaid expenses 934 1,207
Prepaid taxes 5,650 1,119
Prepaid insurance 459 2,042
Due from related parties 86 86
Other current assets 532 596
Total $ 7,924 $ 21,440