Fair Value Measurements - Schedule of Fair Value Hierarchy of Financial Assets Carried at Fair Value and Measured on Recurring Basis (Detail) - Fair value measurements, Recurring - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Cash equivalents:
Total assets at fair value	$ 4,278	$ 4,264
Money market and other funds
Cash equivalents:
Cash equivalents: money market and other funds	4,278	4,264
Quoted prices in active markets using identical  assets (Level 1)
Cash equivalents:
Total assets at fair value	4,278	4,264
Quoted prices in active markets using identical  assets (Level 1) | Money market and other funds
Cash equivalents:
Cash equivalents: money market and other funds	4,278	4,264
Significant other observable inputs (Level 2)
Cash equivalents:
Total assets at fair value	0	0
Significant other observable inputs (Level 2) | Money market and other funds
Cash equivalents:
Cash equivalents: money market and other funds	0	0
Significant unobservable inputs (Level 3)
Cash equivalents:
Total assets at fair value	0
Significant unobservable inputs (Level 3) | Money market and other funds
Cash equivalents:
Cash equivalents: money market and other funds	$ 0	$ 0