Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 171,452	$ 29,033
Short-term investments	59,574	127,822
Short-term investments		127,822
Accounts receivable, net	25,758	27,153
Inventory, net	26,159	19,781
Prepaid expenses and other	4,028	8,818
Total current assets	286,971	212,607
Property and equipment, net	20,856	20,184
Operating lease right-of-use assets	22,263	24,648
Other assets	2,727	2,315
Total assets	332,817	259,754
Current liabilities:
Accounts payable	3,753	10,282
Accrued liabilities	3,444	4,973
Accrued compensation and other employee benefits	13,476	15,579
Customer deposits	1,477	6,389
Deferred revenue, current portion	5,564	3,997
Operating lease liabilities, current portion	4,402	3,766
Total current liabilities	32,116	44,986
Deferred revenue, net of current portion	1,148	976
Other long-term liabilities	0	322
Long-term debt, net	169,964	79,951
Operating lease liabilities, net of current portion	26,994	29,368
Total liabilities	230,222	155,603
Commitment and contingencies (Note 11)
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; 38,300 and 36,298 shares issued and outstanding at September 30, 2020 and December 31, 2019, respectively	4	4
Additional paid-in capital	621,372	535,954
Accumulated other comprehensive income	245	145
Accumulated deficit	(519,026)	(431,952)
Total stockholders’ equity	102,595	104,151
Total liabilities and stockholders’ equity	$ 332,817	$ 259,754