| Dec'19 | Dec'18 | Dec'17 | ||||
|---|---|---|---|---|---|---|
Cash flows from operating activities: | ||||||
Net loss | ||||||
-96,746 | -75,765 | -52,308 | ||||
Adjustments to reconcile net loss to cash used in operating activities: | ||||||
Depreciation and amortization | ||||||
13,408 | 9,290 | 5,634 | ||||
Stock-based compensation expense | ||||||
7,711 | 2,911 | 1,853 | ||||
Change in fair value of convertible note derivative liability | ||||||
- | 1,248 | - | ||||
Bad debt expense | ||||||
1,371 | 999 | 636 | ||||
Compensation expense related to stock sales by current and former employees | ||||||
819 | 847 | - | ||||
Change in fair value of convertible preferred stock warrant liability | ||||||
2,100 | 450 | - | ||||
Accrued interest on convertible notes | ||||||
- | 223 | - | ||||
Loss on retirement of property and equipment | ||||||
- | -203 | -140 | ||||
Accretion of unconditional endowment grant liability | ||||||
94 | 118 | - | ||||
Accretion of debt discounts | ||||||
11 | 104 | 27 | ||||
Amortization of premiums (discounts) on short-term investments | ||||||
320 | -78 | -157 | ||||
Issuance of common stock warrant to third-party service provider | ||||||
- | - | 43 | ||||
Changes in operating assets and liabilities: | ||||||
Accounts receivable | ||||||
1,579 | 1,572 | 4,206 | ||||
Inventory, net | ||||||
13,244 | 3,741 | 3,913 | ||||
Prepaid expenses and other current assets | ||||||
4,108 | 5,338 | 2,386 | ||||
Other assets | ||||||
1,026 | 318 | 802 | ||||
Accounts payable | ||||||
6,010 | -2,576 | -88 | ||||
Accrued consignor payable | ||||||
17,561 | 6,587 | 10,462 | ||||
Other accrued and current liabilities | ||||||
10,686 | 15,681 | 6,144 | ||||
Other noncurrent liabilities | ||||||
2,762 | 3,376 | 33 | ||||
Net cash used in operating activities | ||||||
-54,490 | -47,195 | -38,574 | ||||
Cash flow from investing activities: | ||||||
Purchases of short-term investments | ||||||
220,609 | 31,454 | 27,521 | ||||
Proceeds from maturities of short-term investments | ||||||
39,281 | 9,624 | 30,338 | ||||
Proceeds from sale of short-term investments | ||||||
- | 7,023 | - | ||||
Capitalized proprietary software development costs | ||||||
9,267 | 5,724 | 2,521 | ||||
Purchases of property and equipment | ||||||
24,761 | 13,392 | 11,599 | ||||
Net cash provided by investing activities | ||||||
-215,356 | -33,923 | -11,303 | ||||
Cash flow from financing activities: | ||||||
Proceeds from issuance of common stock in initial public offering, net of issuance costs | ||||||
315,541 | - | - | ||||
Proceeds from issuance of redeemable convertible preferred stock, net of issuance costs | ||||||
43,492 | 86,640 | 47,757 | ||||
Proceeds from issuance of convertible preferred stock, net of issuance costs | ||||||
26,283 | 9,627 | - | ||||
Proceeds from issuance of convertible notes, net of issuance costs | ||||||
- | 14,273 | - | ||||
Proceeds from exercise of stock options and common stock warrants | ||||||
2,729 | 614 | 212 | ||||
Payment of deferred offering costs | ||||||
- | 24 | - | ||||
Taxes paid related to net share settlement of equity awards | ||||||
130 | - | - | ||||
Issuance cost paid related to conversion of convertible notes | ||||||
- | 545 | - | ||||
Repayment of debt | ||||||
9,250 | 4,500 | 1,250 | ||||
Net cash provided by financing activities | ||||||
378,665 | 106,085 | 46,719 | ||||
Net (decrease) increase in cash, cash equivalents and restricted cash | ||||||
108,819 | 24,967 | -3,158 | ||||
Supplemental disclosures of cash flow information | ||||||
Cash paid for interest | ||||||
553 | 666 | 704 | ||||
Cash paid for income taxes | ||||||
102 | 49 | 22 | ||||
Supplemental disclosures of non-cash investing and financing activities | ||||||
Issuance of convertible preferred stock upon extinguishment of convertible notes | ||||||
- | 10,557 | - | ||||
Issuance of redeemable convertible preferred stock upon extinguishment of convertible notes | ||||||
- | 5,642 | - | ||||
Accretion of redeemable convertible preferred stock to redemption value | ||||||
3,355 | 8,922 | 2,610 | ||||
Loss on extinguishment of convertible notes | ||||||
- | 370 | - | ||||
Purchases of property and equipment included in accounts payable | ||||||
1,841 | 158 | 196 | ||||
Deferred offering costs in accounts payable and accrued liabilities | ||||||
-10 | 10 | - | ||||
Reclassification of deferred offering costs | ||||||
5,333 | - | - | ||||
Conversion of convertible preferred stock warrants in connection with IPO | ||||||
2,710 | - | - | ||||
Redeemable Convertible Preferred Stock | ||||||
Conversion of convertible stock in connection with IPO | ||||||
198,228 | - | - | ||||
Convertible Preferred Stock | ||||||
Conversion of convertible stock in connection with IPO | ||||||
169,102 | - | - | ||||