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BeiGene Exclusive Option and License Agreement - Additional information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Jan. 03, 2020
BeiGene Exclusive Option and License Agreement
Up-front fee	$ 3,000
Revenue recognized	1,500
Contract acquisition costs	270
Amortization expense	135
Deferred Costs	135
Exclusive Option and License Agreement
BeiGene Exclusive Option and License Agreement
Upfront cash payment		$ 3,000
Future option exercise and milestone payments, maximum		$ 132,000
License Agreement
BeiGene Exclusive Option and License Agreement
Revenue recognized	1,500
Royalty
BeiGene Exclusive Option and License Agreement
Revenue recognized	$ 0

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