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Accrued Liabilities (Accrued Liabilities) (Detail) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Payables and Accruals [Abstract]    
Compensation $ 5,704 $ 6,823
Interest 136 70
Legal 929 921
Accrued liabilities, amounts received in advance of revenue recognition 4 5
Other 4,253 3,145
Total 11,959 [1] 11,923 [2]
Deferred Revenue, Current $ 933 $ 959
[1] unaudited
[2] Note 1