Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 287,679	$ 171,082
Short-term investments	0	12,592
Accounts receivable, net of allowance for doubtful accounts of $589 and $75 at June 30, 2020 and December 31, 2019, respectively	14,115	7,879
Inventory, net	30,138	15,659
Prepaid expenses and other current assets	3,573	4,468
Total current assets	335,505	211,680
Property and equipment, net	5,562	3,047
Intangible asset, net	254	311
Other assets	7,415	4,784
Total assets	348,736	219,822
Current liabilities
Accounts payable	10,728	5,882
Accrued liabilities	3,961	2,174
Accrued compensation and benefits	5,289	3,375
Operating lease liability, current portion	851	602
Debt, current portion	10,000	0
Total current liabilities	30,829	12,033
Operating lease liability, net of current portion	9,261	4,450
Debt, net of unamortized debt issuance costs, net of current portion	10,750	20,336
Total liabilities	50,840	36,819
Stockholders’ equity
Preferred stock, par value $0.0001 per share; 10,000,000 shares authorized, no shares issued and outstanding at June 30, 2020 and December 31, 2019	0	0
Common stock, par value $0.0001, 50,000,000 shares authorized at June 30, 2020 and December 31, 2019; 39,462,405 and 34,110,995 shares issued and outstanding at June 30, 2020 and December 31, 2019, respectively	4	3
Additional paid-in capital	512,588	363,012
Accumulated deficit	(213,983)	(179,584)
Accumulated other comprehensive loss	(713)	(428)
Total stockholders’ equity	297,896	183,003
Total liabilities and stockholders’ equity	$ 348,736	$ 219,822