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Other Assets, Net - Summary of Other Assets, Net (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Prepaid assets	$ 155	$ 218
Prepaid insurance	115	45
Other	33	99
Other assets, net	$ 303	$ 362

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Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets.

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