Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 81,830	$ 69,886
Restricted cash	567	567
Marketable securities	43,873	91,015
Accounts receivable, net	21,175	23,289
Inventory	7,506	5,323
Prepaid expenses	11,346	12,131
Other current assets	17,078	846
Total current assets	183,375	203,057
Property and equipment, net	1,276	2,293
Intangible assets	5,984	6,583
Right of use assets - operating leases	4,832	6,704
Other assets	484	514
Total assets	195,951	219,151
Current liabilities:
Accounts payable	15,767	6,030
Accrued expenses and other current liabilities	63,662	53,030
Operating lease liability, current	2,229	2,198
Total current liabilities	81,658	61,258
Convertible notes payable	208,902	195,591
Term loan	9,941	0
Operating lease liability, long term	4,031	4,581
Total liabilities	304,532	261,430
Commitments and contingencies
Stockholders’ equity (deficit):
Common stock, 0.0001 par value; 200,000,000 shares authorized, 46,548,201 shares and 46,189,870 shares issued and outstanding at September 30, 2020 and December 31, 2019	5	5
Additional paid-in-capital	1,215,769	1,194,327
Accumulated other comprehensive income	82	3
Accumulated deficit	(1,324,437)	(1,236,614)
Total stockholders’ equity (deficit)	(108,581)	(42,279)
Total liabilities and stockholders’ equity (deficit)	$ 195,951	$ 219,151