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v3.20.4

Commitments (Details) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2020 USD ($) item | Dec. 31, 2019 USD ($)
Commitments [Line Items] |  |  |
Capital expenditures committed, but not yet incurred |  | $ 751,000 | $ 2,697,000
Contract period for inventory purchase | 2 years |  |
Period for options to extend contract period | 4 years |  |
Period of options exercised |  | 1 year |
Purchase commitment amount purchased |  | $ 17,681,000 |
Minimum [Member] |  |  |
Commitments [Line Items] |  |  |
Purchase commitment quantity | item |  | 150,000 |
Purchase commitment |  | $ 11,104,000 |
Maximum [Member] |  |  |
Commitments [Line Items] |  |  |
Purchase commitment quantity | item |  | 245,900 |
Purchase commitment |  | $ 51,028,000 |

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- Definition Period covered by the long-term purchase commitment, for an option to extend in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Future cash outflow to pay for purchases of fixed assets that have occurred. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4332-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4313-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586 + Details
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