Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 37,187	$ 151,570
Short-term investments	102,614	88,794
Accounts receivable, net	68,828	56,022
Inventory	40,410	27,059
Licensing receivable	90,000	0
Prepaid expenses and other current assets	16,611	8,310
Total current assets	355,650	331,755
Property, plant and equipment, net	51,472	54,260
Operating lease right-of-use assets	22,669	14,084
Other assets	1,600	1,946
Total assets	431,391	402,045
Current liabilities
Accounts payable	8,285	8,826
Accrued expenses and other current liabilities	112,341	90,723
Operating lease liabilities	4,365	4,923
Total current liabilities	124,991	104,472
Convertible notes, net	234,527	210,373
Deferred revenue, non-current	64,315	50,858
Operating lease liabilities, non-current	21,751	10,206
Other non-current liabilities	3,140	2,168
Total liabilities	448,724	378,077
Commitments and contingencies (Note 13)
Stockholders’ (deficit) equity
Preferred stock, $0.001 par value; 15,000,000 shares authorized as of December 31, 2021 and December 31, 2020; None issued and outstanding	0	0
Common stock, $0.001 par value; 150,000,000 shares authorized as of December 31, 2021 and December 31, 2020; 48,444,473 and 46,821,644 shares issued and outstanding as of December 31, 2021 and December 31, 2020, respectively	48	47
Additional paid-in capital	1,136,656	1,103,074
Accumulated other comprehensive loss	(126)	(52)
Accumulated deficit	(1,153,911)	(1,079,101)
Total stockholders’ (deficit) equity	(17,333)	23,968
Total liabilities and stockholders’ (deficit) equity	$ 431,391	$ 402,045