| Mar'20 | Dec'19 | Sep'19 | Jun'19 | Mar'19 | Dec'18 | Sep'18 | Jun'18 | Mar'18 | Dec'17 |
|---|---|---|---|---|---|---|---|---|---|
Cash flows from operating activities | |||||||||
Net loss | |||||||||
-146,503 | -140,668 | -107,669 | -96,290 | -85,998 | -76,938 | -71,236 | 0 | 0 | 0 |
Adjustments to reconcile net loss to net cash used in operating activities | |||||||||
Depreciation and amortization | |||||||||
6,140 | 6,144 | 6,111 | 5,951 | 6,061 | 5,913 | 5,727 | 0 | 0 | 0 |
Loss on disposal of property and equipment | |||||||||
- | - | -189 | 0 | 0 | 0 | - | - | - | - |
Non-cash lease expense | |||||||||
0 | 0 | - | - | - | - | - | - | - | - |
Stock-based compensation | |||||||||
14,289 | 13,003 | 11,170 | 8,893 | 6,464 | 4,289 | 2,961 | 0 | 0 | 0 |
Discount accretion on investment securities | |||||||||
0 | 0 | - | - | - | - | - | - | - | - |
Non-cash interest expense | |||||||||
195 | 215 | 233 | 286 | 292 | 301 | 254 | 0 | 0 | 0 |
Change in fair value of redeemable convertible preferred stock warrant liability | |||||||||
- | - | - | - | - | - | -13 | 0 | 0 | 0 |
Amortization of debt discount | |||||||||
235 | 260 | 282 | 297 | 307 | 293 | 308 | 0 | 0 | 0 |
Changes in assets and liabilities: | |||||||||
Accounts receivable, net | |||||||||
6,833 | 6,076 | 6,685 | 7,238 | 3,982 | 3,955 | 3,073 | 0 | 0 | 0 |
Inventories | |||||||||
6,314 | 1,855 | 1,302 | 1,244 | 1,336 | 3,289 | 4,202 | 0 | 0 | 0 |
Prepaid expenses and other current assets | |||||||||
476 | 1,805 | -746 | 1,086 | 1,999 | 2,216 | 1,760 | 0 | 0 | 0 |
Other non-current assets | |||||||||
2,069 | 1,610 | 2,064 | -198 | 744 | 1,093 | 812 | 0 | 0 | 0 |
Accounts payable | |||||||||
2,220 | 3,437 | 3,278 | 2,124 | 435 | 2,090 | 3,759 | 0 | 0 | 0 |
Accrued expenses | |||||||||
515 | 2,892 | 4,210 | 1,329 | 474 | 587 | -114 | 0 | 0 | 0 |
Accrued compensation | |||||||||
1,177 | 3,571 | 5,060 | 6,497 | 4,400 | 1,864 | 1,932 | 0 | 0 | 0 |
Accrued litigation settlement | |||||||||
- | 0 | - | - | - | - | - | - | - | - |
Other liabilities | |||||||||
-595 | -193 | -247 | -147 | 44 | 270 | 50 | 0 | 0 | 0 |
Net cash used in operating activities | |||||||||
-139,025 | -101,167 | -87,937 | -81,275 | -76,135 | -71,832 | -66,164 | 0 | 0 | 0 |
Cash flows from investing activities | |||||||||
Purchases of property and equipment | |||||||||
13,860 | 14,893 | 14,757 | 11,911 | 7,368 | 4,099 | 3,688 | 0 | 0 | 0 |
Purchases of investments | |||||||||
97,486 | 120,276 | 177,574 | 137,413 | 86,774 | 63,984 | 3,523 | 0 | 0 | 0 |
Proceeds from maturity of investments | |||||||||
0 | 0 | - | - | - | - | 34,500 | 0 | 0 | 0 |
Net cash provided by (used in) investing activities | |||||||||
17,275 | -26,648 | -104,810 | -103,219 | -75,933 | -46,666 | 27,306 | 0 | 0 | 0 |
Cash flows from financing activities | |||||||||
Proceeds from exercise of stock options | |||||||||
4,986 | 3,624 | 2,170 | 1,149 | 294 | 409 | 331 | 0 | 0 | 0 |
Proceeds from public offering, net of underwriting discounts and commissions and offering expenses | |||||||||
272,631 | 85,453 | 156,208 | 0 | 0 | 0 | - | - | - | - |
Proceeds from issuance of Series D redeemable convertible preferred stock, net of issuance costs | |||||||||
- | - | - | - | - | - | 90,850 | 0 | 0 | 0 |
Payments of deferred offering costs | |||||||||
- | - | - | - | - | - | 2,359 | 0 | 0 | 0 |
Repayments of long-term debt | |||||||||
0 | 0 | - | - | - | - | - | - | - | - |
Repurchases of common stock for income tax withholding | |||||||||
0 | 0 | - | - | - | - | - | - | - | - |
Net cash provided by financing activities | |||||||||
277,307 | 87,636 | 158,578 | 162,233 | 102,778 | 159,159 | 88,822 | 0 | 0 | 0 |
Effect of exchange rates on cash, cash equivalents and restricted cash | |||||||||
0 | 0 | - | - | - | - | - | - | - | - |
Net increase (decrease) in cash, cash equivalents and restricted cash | |||||||||
155,569 | -40,140 | -34,139 | -22,261 | -49,290 | 40,661 | 49,964 | 0 | 0 | 0 |
Supplemental disclosure of cash flow information | |||||||||
Interest paid | |||||||||
637 | 718 | 779 | 769 | 774 | 755 | 751 | 0 | 0 | 0 |
Income taxes paid, net of refunds | |||||||||
250 | 282 | 291 | 380 | 328 | 227 | 179 | 0 | 0 | 0 |
Non-cash investing and financing activities | |||||||||
Property and equipment additions included in accrued expenses and accounts payable | |||||||||
758 | -881 | 170 | 0 | 0 | 0 | - | - | 0 | 0 |
Operating lease right-of-use assets obtained in exchange for operating lease liabilities | |||||||||
0 | 0 | - | - | - | - | - | - | - | - |
Offering expenses included in accounts payable and accrued expenses | |||||||||
- | - | - | - | 1,288 | 2,047 | 1,308 | 0 | 0 | 0 |
Conversion of redeemable convertible preferred stock warrant liability to equity | |||||||||
- | - | 631 | 0 | 0 | 0 | - | - | - | - |
Conversion of redeemable convertible preferred stock to common stock | |||||||||
- | - | 290,462 | 0 | 0 | 0 | - | - | - | - |