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BALANCE SHEET DETAILS - Accounts and Other Receivables (Detail) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Receivables [Abstract] |  |
Trade accounts receivable | $ 1,402 | $ 1,618
Other receivables | 632 | 600
Accounts and other receivables | $ 2,034 | $ 2,218

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