Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 112,250	$ 107,068	$ 411,848
Restricted Cash and Cash Equivalents, Current	898	0	0
Short-term investments	84,282	241,821
Accounts receivable, net	31,506	40,130
Inventory, net	43,273	31,486
Prepaid expenses and other	14,565	7,115
Total current assets	286,774	427,620
Property and equipment, net	44,457	27,043
Operating lease right-of-use assets	17,581	19,226
Other assets	4,600	5,592
Total assets	353,412	479,481
Current liabilities:
Accounts payable	16,619	14,283
Accrued liabilities	7,884	6,765
Accrued compensation and other employee benefits	17,494	17,466
Customer deposits	1,757	1,278
Deferred revenue and other liabilities, current portion	9,588	7,474
Operating lease liabilities, current portion	5,518	4,889
Total current liabilities	58,860	52,155
Deferred revenue and other liabilities, net of current portion	3,754	3,527
Long-term debt, net	226,622	225,144
Operating lease liabilities, net of current portion	18,362	21,693
Total liabilities	307,598	302,519
Commitments and contingencies (Note 16)
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; 46,719 and 45,729 shares issued and outstanding at December 31, 2022 and 2021, respectively	5	5
Additional paid-in-capital	855,694	827,028
Accumulated other comprehensive loss	(589)	(318)
Accumulated deficit	(809,296)	(649,753)
Total stockholders’ equity	45,814	176,962	$ 306,948
Total liabilities and stockholders’ equity	$ 353,412	$ 479,481
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	15,000,000	15,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, shares outstanding (in shares)	46,719,000	45,729,000
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	150,000,000	150,000,000
Common stock, shares issued (in shares)	46,719,000	45,729,000