Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 17,785	$ 24,301
Short-term investments	88,496	86,529
Prepaid expenses and other current assets	2,065	2,514
Total current assets	108,346	113,344
Property and equipment, net	393	522
In-process R&D	10,806	11,372
Goodwill	19,432	26,918
Other non-current assets	1,651	131
Total assets	140,628	152,287
Current liabilities:
Accounts payable	2,903	3,879
Accrued expenses and other current liabilities	5,388	3,375
Total current liabilities	8,291	7,254
Long-term liabilities:
Debt facility	24,962	24,530
Contingent consideration		12,214
Other long-term liabilities	572	70
Total liabilities	33,825	44,068
Stockholders’ equity:
Common stock, $0.001 par value, 200,000,000 shares authorized as of September 30, 2019 and December 31, 2018; 41,208,261 and 35,146,096 shares issued and outstanding as of September 30, 2019 and December 31, 2018, respectively	42	36
Additional paid-in capital	283,170	237,702
Accumulated other comprehensive income (loss)	(236)	200
Accumulated deficit	(176,173)	(129,719)
Total stockholders’ equity	106,803	108,219
Total liabilities and stockholders’ equity	$ 140,628	$ 152,287