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Prepaid Expenses and Other Current Assets (Detail) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Prepaid Expenses And Other Current Assets [Line Items] |  |
Equipment maintenance and services | $ 1,677 | $ 1,091
Prepaid taxes | 843 | 311
Prepaid insurance | 629 | 594
Deferred costs | 55 | 67
Other | 697 | 218
Total prepaid expenses and other current assets | $ 3,901 | $ 2,281

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- Definition Sum of the carrying amounts as of the balance sheet date of deferred costs capitalized at the end of the reporting period that are expected to be charged against earnings within one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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