Investments and Fair Value Measurements - Category of Financial Instruments Not Held at Fair Value (Detail) - USD ($) $ in Thousands |
Mar. 31, 2019 |
Dec. 31, 2018 |
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| Carrying Amount | ||
| Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] | ||
| Financial Assets, Investments | $ 1,493 | $ 1,493 |
| Carrying Amount | Level I | ||
| Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] | ||
| Financial Assets, Cash and cash equivalents | 45,494 | 69,283 |
| Fair Value | ||
| Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] | ||
| Financial Assets, Investments | 1,493 | 1,493 |
| Fair Value | Level I | ||
| Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] | ||
| Financial Assets, Cash and cash equivalents | $ 45,494 | $ 69,283 |
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- Definition 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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- Definition Fair value portion of investments accounted under the equity method. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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