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Unaudited Condensed Statements of Operations - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Income Statement [Abstract] |  |
Revenue | $ 40,387 | $ 32,440
Operating expenses: |  |
Costs of revenue (excluding amortization of purchased technology) | 18,808 | 15,379
Selling, general and administrative expenses | 28,702 | 19,675
Research and development expenses | 2,176 | 2,125
Amortization of intangible assets | 0 | 141
Total operating expenses | 49,686 | 37,320
Loss from operations | (9,299) | (4,880)
Interest expense | (3,491) | (2,868)
Change in fair value of financial instruments | 267 | (318)
Other income, net | 510 | 112
Loss before income taxes | (12,013) | (7,954)
Income tax expense | 25 | 58
Net loss | (12,038) | (8,012)
Accretion of redeemable convertible preferred stock | (4,640) | (9,318)
Deemed dividend recorded in connection with financing transactions | (13,601) | (1,152)
Net loss attributable to common stockholders (diluted) | $ (30,279) | $ (18,482)
Net loss per share: |  |
Net loss per share, basic and diluted (USD per share) | $ (8.46) | $ (293.34)
Weighted average shares: |  |
Weighted-average number of shares used to compute net loss per share, basic and diluted (in shares) | 3,578,771 | 63,005

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