CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 68,264	$ 27,349
Short-term marketable securities	180,339	164,065
Accounts receivable, net	637	623
Prepaid expenses and other current assets	10,114	12,995
Total current assets	259,354	205,032
Marketable securities	7,221	34,242
Property and equipment, net	1,276	1,335
Intangible assets	7,011	7,048
Other assets	3,114	3,554
Total assets	277,976	251,211
Current liabilities:
Accounts payable	5,703	9,985
Accrued expenses	7,571	10,051
Current portion of lease liabilities	741	693
Discontinued operations	2,202	2,202
Total current liabilities	16,217	22,931
Other liabilities	1,840	2,172
Contingent consideration	23,800	28,400
Deferred tax liability	367	367
Total liabilities	42,224	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 June 30, 2022 and December 31, 2021
Common stock, $0.00001 par value; 100,000,000 shares authorized at June 30, 2022 and December 31, 2021; 66,667,580 and 61,228,446 shares issued and outstanding at June 30, 2022 and December 31, 2021, respectively	1	1
Additional paid-in capital	871,805	792,971
Accumulated other comprehensive loss	(1,326)	(224)
Accumulated deficit	(634,728)	(595,407)
Total stockholders' equity	235,752	197,341
Total liabilities and stockholders' equity	$ 277,976	$ 251,211