Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statements of Operations
Revenue	$ 64,605	$ 56,168	$ 145,629	$ 103,365
Revenue, type	us-gaap:ServiceMember	us-gaap:ServiceMember	us-gaap:ServiceMember	us-gaap:ServiceMember
Cost of services	$ 52,650	$ 44,716	$ 117,072	$ 81,949
Cost of services, type	us-gaap:ServiceMember	us-gaap:ServiceMember	us-gaap:ServiceMember	us-gaap:ServiceMember
Gross profit	$ 11,955	$ 11,452	$ 28,557	$ 21,416
Operating expenses:
Sales and marketing	3,608	3,117	6,875	5,463
General and administrative	10,167	5,981	19,643	10,489
Total operating expenses	13,775	9,098	26,518	15,952
Income (loss) from operations	(1,820)	2,354	2,039	5,464
Other income (expense):
Other income	3		167
Interest income (expense), net	5	(128)	155	(166)
Convertible preferred stock warrant valuation adjustment		(642)		(1,193)
Total other income (expense), net	8	(770)	322	(1,359)
Income (loss) before income taxes	(1,812)	1,584	2,361	4,105
Provision for income taxes		64	116	64
Net income (loss)	(1,812)	$ 1,520	2,245	$ 4,041
Net income (loss) attributable to common stockholders	$ (1,812)		$ 2,245
Net income (loss) per share attributable to common stockholders:
Basic (in dollars per share)	$ (0.02)		$ 0.03
Diluted (in dollars per share)	$ (0.02)		$ 0.02
Weighted-average shares used in computing net earnings (loss) per share:
Basic (in shares)	85,281,151	5,172,209	84,909,692	5,164,564
Diluted (in shares)	85,281,151	5,172,209	98,887,190	5,164,564