Fair Value Measurement of Assets and Liabilities - Summary of Company's Financial Instruments, Fair Value on a Recurring Basis (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Cash equivalents
Total cash equivalents	$ 126	$ 10,085
Level 1
Cash equivalents
Total cash equivalents	126	10,085
Money market funds
Cash equivalents
Total cash equivalents	126	10,085
Money market funds \| Level 1
Cash equivalents
Total cash equivalents	$ 126	$ 10,085

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant