Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 167,988	$ 23,639
Restricted cash	50	50
Accounts receivable, net	20,837	11,302
Inventories, net	7,195	3,953
Prepaid expenses and other current assets	3,391	464
Total current assets	199,461	39,408
Property and equipment, net	5,476	3,331
Restricted cash	338	338
Deposits and other assets	536	1,469
Total assets	205,811	44,546
Current liabilities
Accounts payable	3,533	2,549
Payroll-related accruals	8,596	5,225
Accrued expenses and other current liabilities	2,198	1,096
Total current liabilities	14,327	8,870
Notes payable, net		19,481
Warrant liabilities		1,169
Total liabilities	14,327	29,520
Commitments and contingencies (Note 6)
Mezzanine equity
Redeemable convertible preferred stock, par value $0.001, no shares authorized, issued, and outstanding as of September 30, 2020; 32,225,227 shares authorized, 31,968,570 shares issued and outstanding as of December 31, 2019; aggregate liquidation preference of zero as of September 30, 2020 and $54,415 as of December 31, 2019		54,170
Stockholders' equity (deficit)
Preferred stock, $0.001 par value, 10,000,000 shares authorized, no shares issued and outstanding as of September 30, 2020; no shares authorized, issued, and outstanding as of December 31, 2019
Common stock, $0.001 par value, 300,000,000 and 49,019,607 shares authorized as of September 30, 2020 and December 31, 2019, respectively; 48,658,271 and 6,720,767 shares issued and outstanding as of September 30, 2020 and December 31, 2019, respectively	49	7
Additional paid in capital	225,843	2,061
Accumulated deficit	(34,408)	(41,212)
Total stockholders' equity (deficit)	191,484	(39,144)
Total liabilities, mezzanine equity and stockholders' equity (deficit)	$ 205,811	$ 44,546