CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 109,965	$ 52,389
Accounts receivables	2,886	0
Prepaid expenses and other current assets	13,728	7,478
Restricted cash	0	3,000
Total current assets	126,579	62,867
Restricted cash	20	20
Property and equipment, net of accumulated depreciation of $911 and $882, respectively	93	123
Intangible assets	46,400	46,400
Goodwill	13,064	13,064
Other assets	258	349
Total Assets	186,414	122,823
Current liabilities:
Accounts payable	2,004	3,102
Accrued expenses	3,538	3,973
Deferred revenue	1,500	1,500
Other current liabilities	490	489
Total current liabilities	17,367	18,049
Deferred revenue, net of current portion	0	1,500
Deferred tax liability	12,528	12,528
Other liabilities	84	118
Total Liabilities	177,144	132,050
Stockholders’ Equity ( Deficit):
Preferred stock, $0.001 par value per share; 5,000,000 shares authorized at March 31, 2021 and December 31, 2020; no shares issued and outstanding at March 31, 2021 and December 31, 2020	0	0
Common stock, $0.001 par value per share; 200,000,000 shares authorized at March 31, 2021 and December 31, 2020; 171,978,799 and 140,449,647 shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively	172	140
Additional paid-in capital	380,531	306,554
Accumulated deficit	(371,433)	(315,921)
Total Stockholders’ Equity (Deficit)	9,270	(9,227)
Total Liabilities and Stockholders’ Equity (Deficit)	$ 186,414	$ 122,823