Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 25,671	$ 24,301
Short-term investments	79,508	86,529
Prepaid expenses and other current assets	2,339	2,514
Total current assets	107,518	113,344
Property and equipment, net	474	522
In-process R&D	11,135	11,372
Goodwill	26,849	26,918
Other non-current assets	2,287	131
Total assets	148,263	152,287
Current liabilities:
Accounts payable	3,503	3,879
Accrued expenses and other current liabilities	5,417	3,375
Total current liabilities	8,920	7,254
Long-term liabilities:
Debt facility	24,677	24,530
Contingent consideration	12,347	12,214
Other long-term liabilities	515	70
Total liabilities	46,459	44,068
Stockholders’ equity:
Common stock, $0.001 par value, 200,000,000 shares authorized as of March 31, 2019 and December 31, 2018; 35,830,240 and 35,146,096 shares issued and outstanding as of March 31, 2019 and December 31, 2018, respectively	36	36
Additional paid-in capital	243,598	237,702
Accumulated other comprehensive income	1	200
Accumulated deficit	(141,831)	(129,719)
Total stockholders’ equity	101,804	108,219
Total liabilities and stockholders' equity	$ 148,263	$ 152,287