Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 126,027	$ 107,068
Short-term investments	146,315	241,821
Accounts receivable, net	31,404	40,130
Inventory, net	41,524	31,486
Prepaid expenses and other	9,427	7,115
Total current assets	354,697	427,620
Property and equipment, net	35,414	27,043
Operating lease right-of-use assets	17,645	19,226
Other assets	5,623	5,592
Total assets	413,379	479,481
Current liabilities:
Accounts payable	16,292	14,283
Accrued liabilities	6,999	6,765
Accrued compensation and other employee benefits	13,729	17,466
Customer deposits	1,588	1,278
Deferred revenue, current portion	7,987	7,474
Operating lease liabilities, current portion	5,249	4,889
Total current liabilities	51,844	52,155
Deferred revenue, net of current portion	3,857	3,527
Long-term debt, net	225,877	225,144
Operating lease liabilities, net of current portion	19,136	21,693
Total liabilities	300,714	302,519
Commitment and contingencies (Note 10)
Stockholders’ equity:
Preferred stock, $0.0001 par value, 15,000 shares authorized; none issued	0	0
Common stock, $0.0001 par value, 150,000 shares authorized; 46,478 and 45,729 shares issued and outstanding at June 30, 2022 and December 31, 2021, respectively	5	5
Additional paid-in capital	842,602	827,028
Accumulated other comprehensive loss	(1,450)	(318)
Accumulated deficit	(728,492)	(649,753)
Total stockholders’ equity	112,665	176,962
Total liabilities and stockholders’ equity	$ 413,379	$ 479,481