Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 35,507	$ 124,184
Short-term investments	118,649	79,932
Accounts receivable, net	15,030	4,739
Inventory	20,573	7,152
Prepaid expenses and other current assets	3,717	3,482
Total current assets	193,476	219,489
Property and equipment, net	37,918	36,612
Goodwill	2,900
Other intangible asset	1,400
Long-term investments	32,596	56,619
Other assets	17,507	8,441
Total assets	285,797	321,161
Current liabilities:
Accounts payable	7,823	6,956
Accrued expenses and other current liabilities	33,184	27,419
Financing liability — current	9,470	6,977
Deferred revenue — current	1,667	827
Recognized loss on purchase commitments — current	7,420	6,170
Total current liabilities	59,564	48,349
Senior convertible notes	224,670	223,944
Midcap credit facility	39,047	38,833
Mann Group convertible note	8,829	18,425
Accrued interest — promissory notes	86	404
Financing liability — long term	94,447	93,525
Recognized loss on purchase commitments — long term	65,996	76,659
Operating lease liability	5,928	1,040
Deferred revenue — long term	29,762	19,543
Milestone liabilities	4,524	4,838
Deposits from customer		4,950
Total liabilities	532,853	530,510
Commitments and contingencies (Note 15)
Stockholders' deficit:
Undesignated preferred stock, $0.01 par value — 10,000,000 shares authorized; no shares issued or outstanding as of June 30, 2022 and December 31, 2021
Common stock, $0.01 par value - 400,000,000 shares authorized, 257,276,847 and 251,477,562 shares issued and outstanding at June 30, 2022 and December 31, 2021, respectively	2,573	2,515
Additional paid-in capital	2,936,667	2,918,205
Accumulated other comprehensive loss	(1,206)
Accumulated deficit	(3,185,090)	(3,130,069)
Total stockholders' deficit	(247,056)	(209,349)
Total liabilities and stockholders' deficit	$ 285,797	$ 321,161