Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 269,280	$ 171,082
Short-term investments	0	12,592
Accounts receivable, net of allowance for doubtful accounts of $465 and $75 at September 30, 2020 and December 31, 2019, respectively	17,650	7,879
Inventory, net	44,308	15,659
Prepaid expenses and other current assets	3,220	4,468
Total current assets	334,458	211,680
Property and equipment, net	5,792	3,047
Intangible asset, net	225	311
Other assets	7,196	4,784
Total assets	347,671	219,822
Current liabilities
Accounts payable	9,415	5,882
Accrued liabilities	5,977	2,174
Accrued compensation and benefits	7,516	3,375
Operating lease liability, current portion	908	602
Debt, current portion	15,000	0
Total current liabilities	38,816	12,033
Operating lease liability, net of current portion	9,027	4,450
Debt, net of unamortized debt issuance costs, net of current portion	5,930	20,336
Total liabilities	53,773	36,819
Stockholders’ equity
Preferred stock, par value $0.0001 per share; 10,000,000 shares authorized, no shares issued and outstanding at September 30, 2020 and December 31, 2019	0	0
Common stock, par value $0.0001, 50,000,000 shares authorized at September 30, 2020 and December 31, 2019; 39,753,638 and 34,110,995 shares issued and outstanding at September 30, 2020 and December 31, 2019, respectively	4	3
Additional paid-in capital	517,659	363,012
Accumulated deficit	(223,151)	(179,584)
Accumulated other comprehensive loss	(614)	(428)
Total stockholders’ equity	293,898	183,003
Total liabilities and stockholders’ equity	$ 347,671	$ 219,822