Accrued and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Accrued Liabilities And Other Liabilities [Abstract]
Accrued compensation	$ 2,208	$ 3,273
Accrued contracted research and development costs	7,927	10,485
Accrued professional and consulting fees	769	627
Other	607	469
Total accrued and other current liabilities	$ 11,511	$ 14,854

Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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