Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 40,723	$ 69,886
Restricted cash	567	567
Marketable securities	97,257	91,015
Accounts receivable, net	30,371	23,289
Inventory	6,002	5,323
Prepaid expenses	9,244	12,131
Other current assets	1,214	846
Total current assets	185,378	203,057
Property and equipment, net	2,000	2,293
Intangible assets	6,384	6,583
Right of use assets - operating leases	7,304	6,704
Other assets	514	514
Total assets	201,580	219,151
Current liabilities:
Accounts payable	9,192	6,030
Accrued expenses and other current liabilities	49,411	53,030
Operating lease liability, current	2,138	2,198
Total current liabilities	60,741	61,258
Convertible notes payable	199,880	195,591
Term loan	9,939	0
Operating lease liability, long term	5,173	4,581
Total liabilities	275,733	261,430
Commitments and contingencies
Stockholders’ equity (deficit):
Common stock, $.0001 par value; 200,000,000 shares authorized, 46,387,437 shares and 46,189,870 shares issued and outstanding at March 31, 2020 and December 31, 2019	5	5
Additional paid-in-capital	1,200,776	1,194,327
Accumulated other comprehensive income (loss)	(666)	3
Accumulated deficit	(1,274,268)	(1,236,614)
Total stockholders’ equity (deficit)	(74,153)	(42,279)
Total liabilities and stockholders’ equity (deficit)	$ 201,580	$ 219,151