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Commitments and Contingencies - Minimum lease commitments (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Minimum lease commitments, Payments due by period:    
2020 $ 1,274  
2021 4,659  
2022 4,394  
2023 1,035  
2024 551  
Total future minimum lease payments 11,913  
Less: Imputed interest (943)  
Total operating lease liabilities 10,970  
Operating lease liability, current $ 4,177 $ 4,196
Operating Lease, Liability, Current, Statement of Financial Position veco:AccruedAndOtherLiabilitiesCurrent  
Operating lease liability, noncurrent $ 6,793 $ 10,300
Operating Lease, Liability, Noncurrent, Statement of Financial Position us-gaap:OperatingLeaseLiabilityNoncurrent  
Total operating lease liabilities $ 10,970