Prepaid Expenses

12 Months Ended

Dec. 31, 2019

Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]

Prepaid Expenses

5. Prepaid Expenses

As of December 31, 2019, the amount of prepaid expenses was $8,863, consisting of $8,498 of prepaid R&D clinical costs, $181 of prepaid insurance and $184 of other costs. As of December 31, 2018, the amount of prepaid expenses was $4,805, consisting of $4,377 of prepaid R&D clinical costs, $245 of prepaid insurance and $183 of other costs.