Leases - Components of lease (Details) $ in Thousands	12 Months Ended
Dec. 31, 2020 USD ($)
Lease Cost
Variable lease cost	$ 17
Operating lease cost	2,777
Short-term lease cost	311
Amortization of right-of use assets	75
Interest on lease liabilities	13
Finance lease cost	88
Total lease cost	$ 3,176
Operating Leases
Weighted average remaining lease term (years)	6 years 7 months 6 days
Weighted average discount rate	2.70%
Finance Leases
Weighted average remaining lease term (years)	3 years 2 months 12 days
Weighted average discount rate	5.30%
Cost of goods sold
Lease Cost
Lease cost	$ 1,570
Research and development expenses
Lease Cost
Lease cost	621
Selling, general and administrative expenses
Lease Cost
Lease cost	$ 569

Finance Lease, Cost

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Finance Leases [Abstract]

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Operating Lease, Cost, Fixed

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Operating Lease, Cost, Variable

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Operating Leases

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- Definition

Amount of interest expense on finance lease liability.

+ References

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Amount of amortization expense attributable to right-of-use asset from finance lease.

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Weighted average discount rate for finance lease calculated at point in time.

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Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of lease cost recognized by lessee for lease contract.

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of short-term lease cost, excluding expense for lease with term of one month or less.

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