CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 15,232	$ 18,356
Short-term investments	73,919	93,934
Prepaid expenses and other current assets	3,153	5,280
Total current assets	92,304	117,570
Property and equipment, net	1,073	934
Acquired intangible asset	2,258	2,258
Goodwill	881	881
Right-of-use lease assets	603	815
Other assets	956	918
Total assets	98,075	123,376
Current liabilities:
Accounts payable	4,013	3,945
Accrued expenses	6,240	5,452
Lease liabilities	250	297
Total current liabilities	10,503	9,694
Royalty purchase liability	62,114	43,251
Lease liabilities, net of current portion	356	534
Deferred tax liability	289	289
Other liabilities	118
Total liabilities	73,380	53,768
Stockholders’ equity:
Preferred stock, $0.001 par value: 10,000,000 shares authorized; no shares issued and outstanding
Common stock, $0.001 par value: 200,000,000 shares authorized; 24,912,516 and 24,811,567 shares issued and outstanding at September 30, 2020 and December 31, 2019	25	25
Additional paid-in capital	240,049	230,895
Accumulated other comprehensive income	123	38
Accumulated deficit	(215,502)	(161,350)
Total stockholders’ equity	24,695	69,608
Total liabilities and stockholders’ equity	$ 98,075	$ 123,376