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Commitments and Contingencies - Additional Information (Detail)
$ in Thousands
Dec. 31, 2018
USD ($)
Commitments And Contingencies Disclosure [Abstract]  
Estimated annual minimum rent due in next year $ 248
Estimated annual minimum rent due in two years 495
Estimated annual minimum rent due in three years 369
Estimated annual minimum rent due in four years 375
Estimated annual minimum rent due in five years 382
Estimated annual minimum rent due thereafter $ 2,358