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Unaudited Condensed Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Revenue	$ 10,439	$ 8,223	$ 30,173	$ 22,799
Operating expenses:
Costs of revenue (excluding amortization of purchased technology)	4,783	3,852	14,217	11,376
Selling, general and administrative expenses	7,306	4,932	20,787	14,419
Research and development expenses	507	525	1,610	1,592
Amortization of intangible assets	0	47	0	141
Total operating expenses	12,596	9,356	36,614	27,528
Loss from operations	(2,157)	(1,133)	(6,441)	(4,729)
Interest expense	909	704	2,720	2,098
Change in fair value of financial instruments	(200)	55	267	55
Other income, net	125	26	264	77
Net loss	(3,141)	(1,756)	(8,630)	(6,695)
Accretion of redeemable convertible preferred stock	(338)	(2,768)	(4,640)	(6,462)
Deemed dividend recorded in connection with financing transactions	(13,601)	0	(13,601)	(1,152)
Net Income (Loss) Available to Common Stockholders, Basic	(17,080)	(4,524)	(26,871)	(14,309)
Net loss attributable to common stockholders (diluted)	$ (17,080)	$ (4,524)	$ (26,871)	$ (14,309)
Net loss per share:
Net loss per share, basic and diluted (USD per share)	$ (11.29)	$ (71.80)	$ (48.70)	$ (227.11)
Weighted average shares:
Weighted-average number of shares used to compute net loss per share, basic and diluted (Note 2)	1,513,189	63,005	551,730	63,005

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