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Related Party Transactions	6 Months Ended
Related Party Transactions	Jun. 30, 2019
Related Party Transaction, Due from (to) Related Party [Abstract]
Related Party Transactions	Related Party Transactions AstraZeneca PLC Pam P. Cheng, a member of our board of directors, joined AstraZeneca PLC as Executive Vice President, Operations and Information Technology in June 2015. We sell biocatalyst products to AstraZeneca PLC and its controlled purchasing agents and contract manufacturers. We recognized $0.4 million in revenue in the three and six months ended June 30, 2019, compared to $55 thousand and $0.4 million in the three and six months ended June 30, 2018 from transactions with AstraZeneca PLC and its controlled purchasing agents and contract manufacturers, respectively. At June 30, 2019 and December 31, 2018, we had $0.4 million and $0.2 million of accounts receivables from AstraZeneca, PLC, and its controlled purchasing agents and contract manufacturers, respectively.