CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 36,342	$ 27,349
Short-term marketable securities	143,280	164,065
Accounts receivable, net	633	623
Prepaid expenses and other current assets	10,626	12,995
Total current assets	190,881	205,032
Marketable securities	23,955	34,242
Property and equipment, net	1,277	1,335
Intangible assets	7,030	7,048
Other assets	3,384	3,554
Total assets	226,527	251,211
Current liabilities:
Accounts payable	8,121	9,985
Accrued expenses	5,687	10,051
Current portion of lease liabilities	716	693
Discontinued operations	2,202	2,202
Total current liabilities	16,726	22,931
Other liabilities	2,035	2,172
Contingent consideration	27,200	28,400
Deferred tax liability	367	367
Total liabilities	46,328	53,870
Commitments and contingencies (Note 16)
Stockholders' Equity:
Preferred stock, $0.00001 par value; 10,000,000 shares authorized and no shares issued or outstanding at March 31, 2022 and December 31, 2021
Common stock, $0.00001 par value; 100,000,000 shares authorized at March 31, 2022 and December 31, 2021; 61,737,483 and 61,228,446 shares issued and outstanding at March 31, 2022 and December 31, 2021, respectively	1	1
Additional paid-in capital	795,366	792,971
Accumulated other comprehensive loss	(972)	(224)
Accumulated deficit	(614,196)	(595,407)
Total stockholders' equity	180,199	197,341
Total liabilities and stockholders' equity	$ 226,527	$ 251,211