| Dec'19 | Dec'18 | Dec'17 | ||||
|---|---|---|---|---|---|---|
Cash flows from operating activities | ||||||
Net loss | ||||||
-38,403 | -17,453 | -23,039 | ||||
Adjustments to reconcile net loss to net cash used in operating activities: | ||||||
Stock-based compensation | ||||||
7,464 | 2,312 | 1,438 | ||||
Depreciation and amortization | ||||||
774 | 722 | 1,013 | ||||
Change in allowance for doubtful accounts | ||||||
- | - | 36 | ||||
Write-off of public offering costs | ||||||
- | - | 1,292 | ||||
Forgiveness of notes receivable | ||||||
- | - | 437 | ||||
Accretion on marketable securities | ||||||
1,413 | 209 | 0 | ||||
Amortization of debt issuance costs | ||||||
259 | 259 | - | ||||
Write-off of debt discount | ||||||
- | - | 650 | ||||
Amortization of debt discount | ||||||
- | - | 285 | ||||
Change in fair value of redeemable convertible preferred stock warrants | ||||||
0 | 826 | -166 | ||||
Loss on sale and disposal of property and equipment | ||||||
-171 | -52 | -214 | ||||
Changes in operating assets and liabilities: | ||||||
Accounts receivable | ||||||
3,236 | 1,028 | 1,313 | ||||
Inventory | ||||||
2,105 | 759 | 980 | ||||
Prepaid expenses and other assets | ||||||
515 | 752 | -72 | ||||
Accounts payable | ||||||
383 | 251 | 811 | ||||
Accrued liabilities and other | ||||||
4,994 | 1,260 | 1,792 | ||||
Net cash used in operating activities | ||||||
-31,627 | -14,519 | -17,530 | ||||
Cash flows from investing activities | ||||||
Maturities of marketable securities | ||||||
159,800 | 0 | - | ||||
Purchases of marketable securities | ||||||
143,864 | 96,883 | 0 | ||||
Purchases of property and equipment | ||||||
2,445 | 942 | 478 | ||||
Net cash provided by (used in) investing activities | ||||||
13,491 | -97,825 | -478 | ||||
Cash flows from financing activities | ||||||
Proceeds from initial public offering, net of underwriting discounts and commissions | ||||||
0 | 115,506 | 0 | ||||
Proceeds from the exercise of stock options | ||||||
1,490 | 1,614 | 383 | ||||
Proceeds from issuance of common stock under employee stock purchase plan | ||||||
2,203 | 0 | - | ||||
Repurchase of unvested early exercised stock options | ||||||
38 | 73 | 0 | ||||
Repayment of stockholders’ notes receivable | ||||||
- | - | 84 | ||||
Repayments of Long-term Debt | ||||||
- | - | 1,119 | ||||
Payment for Debt Extinguishment or Debt Prepayment Cost | ||||||
- | - | 29,081 | ||||
Proceeds from debt financing | ||||||
- | - | 40,000 | ||||
Payment of debt issuance costs | ||||||
- | - | 1,540 | ||||
Proceeds from the issuance of redeemable convertible preferred stock, net | ||||||
- | - | 5,427 | ||||
Payments of public offering costs | ||||||
167 | 1,897 | 1,292 | ||||
Net cash provided by financing activities | ||||||
3,488 | 115,150 | 12,862 | ||||
Effect of exchange rate changes on cash and cash equivalents | ||||||
-37 | -94 | - | ||||
Net decrease in cash and cash equivalents | ||||||
-14,685 | 2,712 | - | ||||
Effect of exchange rate changes on cash and cash equivalents | ||||||
- | - | -346 | ||||
Net decrease in cash and cash equivalents | ||||||
- | - | -5,492 | ||||
Cash and cash equivalents at | ||||||
Supplemental disclosure of cash flow information | ||||||
Cash paid for interest | ||||||
4,949 | 5,500 | 4,514 | ||||
Supplemental disclosure of non-cash information | ||||||
Conversion of redeemable convertible preferred stock to common stock | ||||||
0 | 118,547 | 0 | ||||
Conversion of preferred stock warrants to common stock warrants | ||||||
0 | 1,248 | - | ||||
Conversion of preferred stock warrants to common stock warrants | ||||||
0 | 1,248 | 0 | ||||
Vesting of early exercised stock options | ||||||
197 | 139 | 122 | ||||
Purchases of property and equipment included in accounts payable and accrued liabilities | ||||||
375 | 82 | 97 | ||||
Public offering costs included in accounts payable | ||||||
0 | 7 | 0 | ||||