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Prepaid Expenses and Other Current Assets | 12 Months Ended
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Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |
Prepaid Expenses and Other Current Assets | Prepaid Expenses and Other Current Assets Prepaid expenses and other current assets consisted of the following (in thousands):
|  | December 31,
|  | 2019 |  | 2018
Research and development claims receivable |  | $ | 27,567 |  |  | $ | 10,272 |
Prepayments |  | 7,023 |  |  | 2,069 |
VAT receivable |  | 1,928 |  |  | 1,973 |
Other asset |  | 279 |  |  | — |
Grant income receivable |  | 547 |  |  | 661 |
Other receivable |  | 482 |  |  | 436 |
Total prepaid expenses and other current assets |  | $ | 37,826 |  |  | $ | 15,411 |
The increase to research and development claims receivable is the result of the increased income tax benefit from increased research and development expenses.

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