| Mar'20 | Dec'19 | Sep'19 | Jun'19 | Mar'19 | Dec'18 | Sep'18 | Jun'18 | Mar'18 |
|---|---|---|---|---|---|---|---|---|
Cash flows from operating activities: | ||||||||
Net loss | ||||||||
-35,504 | -33,547 | -32,005 | -28,830 | -25,750 | -23,756 | 0 | 0 | 0 |
Adjustments to reconcile net loss to net cash used in operating activities: | ||||||||
Depreciation and amortization expense | ||||||||
1,348 | 1,222 | 1,085 | 966 | 848 | 769 | 0 | 0 | 0 |
Stock-based compensation expense | ||||||||
1,182 | 854 | 624 | 360 | 174 | 144 | 0 | 0 | 0 |
Change in fair value of preferred stock warrant liability | ||||||||
614 | 341 | 463 | 646 | 242 | 545 | 0 | 0 | 0 |
Non-cash interest expense and end of term accretion expense | ||||||||
0 | - | - | - | 0 | - | - | - | - |
Non-cash interest expense | ||||||||
- | - | - | - | - | - | 0 | 0 | 0 |
Net amortization of premiums on marketable securities | ||||||||
0 | - | - | - | - | 9 | 0 | 0 | 0 |
Unrealized foreign currency transaction losses | ||||||||
0 | - | - | - | -453 | -150 | 0 | 0 | 0 |
Changes in operating assets and liabilities: | ||||||||
Accounts receivable | ||||||||
998 | 3,166 | 2,632 | 4,371 | 3,238 | 2,513 | 0 | 0 | 0 |
Inventory | ||||||||
1,894 | 4,121 | 3,119 | 3,897 | 3,989 | 2,699 | 0 | 0 | 0 |
Prepaid expenses and other current assets | ||||||||
287 | -250 | 1,486 | 1,038 | 795 | 1,355 | 0 | 0 | 0 |
Accounts payable | ||||||||
274 | 3,443 | 1,971 | 2,379 | 1,765 | 164 | 0 | 0 | 0 |
Accrued expenses and other current liabilities | ||||||||
1,865 | 2,453 | 3,487 | 2,065 | 3,040 | 2,338 | 0 | 0 | 0 |
Deferred revenue | ||||||||
- | -136 | -15 | -26 | 128 | 67 | 0 | 0 | 0 |
Deferred rent | ||||||||
0 | 349 | 344 | 339 | 334 | 329 | 0 | 0 | 0 |
Net cash used in operating activities | ||||||||
-33,196 | -32,286 | -31,142 | -31,609 | -26,919 | -25,984 | 0 | 0 | 0 |
Cash flows from investing activities: | ||||||||
Purchases of property and equipment | ||||||||
439 | 165 | 318 | 529 | 381 | 418 | 0 | 0 | 0 |
Purchases of marketable securities | ||||||||
0 | - | - | - | - | - | - | - | - |
Proceeds from sales and maturities of marketable securities | ||||||||
0 | - | - | - | - | 12,725 | 0 | 0 | 0 |
Net cash provided by (used in) investing activities | ||||||||
-47,783 | -60,501 | -67,995 | -48,724 | 7,344 | 12,307 | 0 | 0 | 0 |
Cash flows from financing activities: | ||||||||
Payments of initial public offering costs and other financing costs | ||||||||
0 | - | - | 0 | 0 | - | - | - | - |
Repayments of long-term debt | ||||||||
- | - | - | - | - | 9,076 | 0 | 0 | 0 |
Proceeds from issuance of common stock upon exercise of stock options | ||||||||
269 | 202 | 109 | 35 | 42 | 46 | 0 | 0 | 0 |
Proceeds from issuance of common stock in connection with employee stock purchase plan | ||||||||
0 | - | - | - | - | - | - | - | - |
Net cash provided by (used in) financing activities | ||||||||
93,572 | 92,723 | 90,689 | 93,080 | 22,247 | 22,064 | 0 | 0 | 0 |
Effect of exchange rate changes on cash, cash equivalents and restricted cash | ||||||||
-70 | -85 | -35 | 56 | -256 | -82 | 0 | 0 | 0 |
Net increase (decrease) in cash, cash equivalents and restricted cash | ||||||||
12,523 | -149 | -8,483 | 12,803 | 2,416 | 8,305 | 0 | 0 | 0 |
Supplemental disclosure of non-cash investing and financing activities: | ||||||||
Transfers of inventory to property and equipment | ||||||||
1,817 | 2,146 | 2,129 | 1,662 | 1,458 | 1,393 | 0 | 0 | 0 |
Purchases of property and equipment included in accounts payable | ||||||||
152 | 169 | 0 | 0 | 0 | - | - | - | 0 |
Offering costs included in accounts payable and accrued expenses | ||||||||
- | - | - | - | 0 | - | - | - | - |