Consolidated Financial Statements Detail - Additional Information 3 (Details) - USD ($) |
12 Months Ended | |
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Dec. 31, 2018 |
Dec. 31, 2017 |
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| Property Plant And Equipment [Line Items] | ||
| Total proceeds from sale of equipment and disposal of certain equipment | $ 1,614,000 | |
| Total carrying value of equipment sold and disposed | 400,000 | |
| Depreciation expense | $ 30,000 | 300,000 |
| Other Income [Member] | ||
| Property Plant And Equipment [Line Items] | ||
| Gain (loss) on sale of equipment | $ 1,200,000 | |
| X | ||||||||||
- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. 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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- Definition Equipment sold and disposed during period. No definition available.
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- Details
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