Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 62,811	$ 48,668
Restricted cash	228	187
Short-term investments	517,432	688,606
Accounts receivable, net of allowance of $2,649 in 2021 and $3,080 in 2020	100,130	78,565
Inventory	28,409	20,031
Prepaid expenses and other current assets, net	30,878	26,606
Total current assets	739,888	862,663
Property and equipment, net	48,884	33,348
Operating lease right-of-use assets	48,337	21,399
Other assets	12,847	14,743
Total assets	849,956	932,153
Current liabilities:
Accounts payable	20,307	8,096
Accrued compensation	30,842	30,371
Other accrued liabilities	86,143	60,407
Deferred revenue, current portion	10,647	50,125
Short-term debt financing	50,049	50,054
Total current liabilities	197,988	199,053
Long-term debt financing	279,777	202,493
Deferred revenue, long-term portion	23,562	22,805
Operating lease liabilities, long-term portion	49,519	21,246
Other long-term liabilities		320
Total liabilities	550,846	445,917
Commitments and contingencies (Note 8)
Stockholders' equity:
Common stock, $0.0001 par value: 750,000 shares authorized at both June 30, 2021 and December 31, 2020, respectively; 88,498 and 86,223 shares issued and outstanding at June 30, 2021 and December 31, 2020, respectively	9	9
Additional paid in capital	1,399,659	1,411,286
Accumulated deficit	(1,102,999)	(929,318)
Accumulated other comprehensive gain	2,441	4,259
Total stockholders' equity	299,110	486,236
Total liabilities and stockholders' equity	$ 849,956	$ 932,153