CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 27,349	$ 22,063
Short-term marketable securities	164,065	32,068
Accounts receivable, net	623	772
Prepaid expenses and other current assets	12,995	2,590
Total current assets	205,032	57,493
Marketable securities	34,242
Property and equipment, net	1,335	1,654
Intangible assets	7,048	7,123
Other assets	3,554	4,514
Total assets	251,211	70,784
Current liabilities:
Accounts payable	9,985	5,254
Accrued expenses	10,051	5,906
Current portion of lease liabilities	693	603
Discontinued operations - current liabilities	2,202	3,111
Total current liabilities	22,931	14,874
Other liabilities	2,172	3,179
Long-term debt, net		10,653
Contingent consideration	28,400	4,061
Deferred tax liability	367	367
Total liabilities	53,870	33,134
Commitments and contingencies (Note 20)
Stockholders' Equity:
Preferred stock, $0.00001 par value; 10,000,000 shares authorized and no shares issued or outstanding at December 31, 2021 and December 31, 2020
Common stock, $0.00001 par value; 100,000,000 shares authorized at December 31, 2021 and December 31, 2020; 61,228,446 and 45,109,314 shares issued and outstanding at December 31, 2021 and December 31, 2020, respectively	1
Additional paid-in capital	792,971	542,286
Accumulated other comprehensive loss	(224)	(94)
Accumulated deficit	(595,407)	(504,542)
Total stockholders' equity	197,341	37,650
Total liabilities and stockholders' equity	$ 251,211	$ 70,784