| Dec'19 | Dec'18 | Dec'17 | ||||
|---|---|---|---|---|---|---|
Cash flows from operating activities: | ||||||
Net loss | ||||||
-25,084 | -19,886 | -23,598 | ||||
Adjustments to reconcile net loss to net cash (used in) provided by operating activities | ||||||
Depreciation and amortization | ||||||
4,748 | 3,066 | 1,216 | ||||
Noncash operating lease cost | ||||||
982 | - | - | ||||
Stock-based compensation expense | ||||||
4,858 | 1,317 | 753 | ||||
Loss on debt extinguishment | ||||||
-1,704 | -4,658 | - | ||||
Change in fair value of convertible preferred stock warrant liability | ||||||
1,403 | 391 | 64 | ||||
Change in fair value of compound derivative instrument | ||||||
- | -574 | 162 | ||||
Accretion of noncash interest and debt reduction | ||||||
156 | 1,188 | 928 | ||||
Other | ||||||
-427 | 5 | -6 | ||||
Changes in operating assets and liabilities | ||||||
Accounts receivable | ||||||
-1,069 | 2,519 | 1,203 | ||||
Inventory and other deferred costs | ||||||
1,174 | 2,068 | 539 | ||||
Prepaid expenses and other current assets | ||||||
2,559 | 1,265 | -177 | ||||
Accounts payable | ||||||
1,398 | 2,164 | 2,635 | ||||
Accrued and other current liabilities | ||||||
1,999 | 997 | 684 | ||||
Contract liabilities | ||||||
-6,920 | 18,207 | 19,072 | ||||
Other long-term liabilities | ||||||
-1,076 | -99 | -67 | ||||
Net cash (used in) provided by operating activities | ||||||
-18,069 | 5,572 | 290 | ||||
Cash flows from investing activities: | ||||||
Purchases of available-for-sale debt securities | ||||||
78,897 | - | - | ||||
Proceeds from maturities of available-for-sale debt securities | ||||||
5,700 | - | - | ||||
Purchases of property and equipment | ||||||
8,382 | 7,852 | 5,158 | ||||
Net cash used in investing activities | ||||||
-81,579 | -7,852 | -5,158 | ||||
Cash flows from financing activities: | ||||||
Proceeds from initial public offering, net of underwriting discounts and commissions | ||||||
144,025 | - | - | ||||
Payments of costs related to initial public offering | ||||||
4,197 | - | - | ||||
Proceeds from borrowings | ||||||
20,000 | - | 17,225 | ||||
Payments of borrowing costs | ||||||
490 | - | 63 | ||||
Repayments under borrowing arrangements | ||||||
25,000 | 645 | 823 | ||||
Debt extinguishment costs | ||||||
794 | - | - | ||||
Proceeds from issuance of common stock under ESPP | ||||||
684 | - | - | ||||
Proceeds from exercise of stock options | ||||||
712 | 76 | 65 | ||||
Other | ||||||
8 | -22 | - | ||||
Net cash provided by financing activities | ||||||
134,948 | -591 | 16,404 | ||||
Effect of exchange rates on cash flows and cash equivalents | ||||||
2 | -2 | 4 | ||||
Net change in cash and cash equivalents | ||||||
35,302 | -2,873 | 11,540 | ||||
Supplemental disclosures of cash flow information: | ||||||
Cash paid for interest | ||||||
1,257 | 698 | 321 | ||||
Income taxes paid | ||||||
6 | 7 | 5 | ||||
Supplemental disclosures of noncash investing and financing activities: | ||||||
Acquisition of property and equipment included in accounts payable and accrued liabilities | ||||||
41 | 323 | 521 | ||||
Convertible Notes conversion on September 20, 2018 (see Note 6) | ||||||
- | 13,431 | - | ||||