Condensed Statements of Operations (Unaudited) - USD ($) shares in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue:
Revenue	$ 22,916,000	$ 7,190,000
Cost of revenue:
Cost of revenue	22,627,000	10,754,000
Gross profit	289,000	(3,564,000)
Operating expenses:
Research and development	7,570,000	5,838,000
Sales and marketing	13,149,000	7,282,000
General and administrative	9,246,000	3,526,000
Total operating expenses	29,965,000	16,646,000
Loss from operations	(29,676,000)	(20,210,000)
Interest income and other income, net	112,000	460,000
Interest expense	(422,000)	(1,001,000)
Change in fair value of redeemable convertible preferred stock warrant liability		101,000
Loss before provision for income taxes	(29,986,000)	(20,650,000)
Provision for income taxes	39,000	0
Net loss	(30,025,000)	(20,650,000)
Net income (loss) attributable to common stockholders:
Basic	(30,025,000)	3,387,000
Diluted	$ (30,025,000)	$ 4,161,000
Net income (loss) per share attributable to common stockholders:
Basic	$ (0.70)	$ 0.77
Diluted	$ (0.70)	$ 0.74
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders:
Basic	42,760	4,388
Diluted	42,760	5,630
Product Revenue
Revenue:
Revenue	$ 18,210,000	$ 5,926,000
Cost of revenue:
Cost of revenue	20,577,000	9,562,000
Service and Other Revenue
Revenue:
Revenue	4,706,000	1,264,000
Cost of revenue:
Cost of revenue	$ 2,050,000	$ 1,192,000