XML 71 R49.htm IDEA: XBRL DOCUMENT v3.20.4
Accrued Expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Accrued Expenses    
External research and development expenses $ 12,820 $ 735
Employee related expenses 5,323 4,971
Intellectual property and patent related fees 4,240 3,725
Sublicensing expenses 771 11,416
Professional service expenses 533 674
Other expenses 359 599
Total accrued expenses $ 24,046 $ 22,120