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Other Assets, Net - Summary of Other Assets, Net (Detail) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
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Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract] |  |
Bonds and escrow deposits | $ 1,108 | $ 1,100
Prepaid insurance | 82 | 60
Other | 300 | 304
Other assets, net | $ 1,490 | $ 1,464

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