Schedule II Valuation and Qualifying Accounts (Details) - Inventory reserves - USD ($) $ in Thousands |
12 Months Ended | ||
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Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
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| SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] | |||
| Balance at Beginning of Period | $ 676 | $ 697 | $ 966 |
| Charged to (Reduction of) Cost and Expenses | 1,767 | 1,828 | 1,237 |
| Deductions | (1,696) | (1,849) | (1,506) |
| Balance at End of Period | $ 747 | $ 676 | $ 697 |
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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 valuation and qualifying accounts and reserves. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of decrease in valuation and qualifying accounts and reserves. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Details
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