Balance at

December

31, 2019

Additions

Deductions

Balance at

June 30, 2020

Accounts receivable and contract assets:

Billed receivables from collaboration partners

$

20,000

$

2,562

$

22,560

$

2

Unbilled receivables from collaboration partners

158

3,086

1,635

1,609

Total Accounts receivable and contract assets

$

20,158

$

5,648

$

24,195

$

1,611

Contract liabilities:

Deferred revenue – Incyte

$

8,378

$

335

$

892

$

7,821

Deferred revenue – GBT

$

20,000

$

590

$

1,589

$

19,001

Total contract liabilities

$

28,378

$

925

$

2,481

$

26,822