Contract Assets and Liabilities (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2020 |
Sep. 30, 2019 |
Sep. 30, 2020 |
Sep. 30, 2019 |
Dec. 31, 2019 |
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| Sale of Product Lines [Line Items] | |||||
| Contract assets | $ 0 | $ 0 | $ 0 | ||
| Magnesium Silicate Product Line | |||||
| Sale of Product Lines [Line Items] | |||||
| Contract liabilities | 11,486 | 11,486 | |||
| Deferred revenue | 10,785 | 10,785 | |||
| Revenue recognized | 806 | 806 | |||
| Sulfate Salts Product Line | |||||
| Sale of Product Lines [Line Items] | |||||
| Contract liabilities | 9,000 | 9,000 | 9,000 | ||
| Deferred revenue | 3,105 | 3,105 | $ 6,450 | ||
| Revenue recognized | $ 1,035 | $ 1,035 | $ 3,339 | $ 1,035 | |
| X | ||||||||||
- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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 Amount of transaction price allocated to performance obligation that has not been recognized as revenue. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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