| 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 | ||||||||
-8,852 | -9,177 | -8,280 | -9,195 | -6,895 | -7,635 | -5,105 | -6,115 | -4,901 |
Adjustments to reconcile net loss to net cash used in operating activities: | ||||||||
Depreciation and amortization expense | ||||||||
371 | 356 | 332 | 289 | 245 | 219 | 213 | 171 | 166 |
Stock-based compensation expense | ||||||||
385 | 282 | 295 | 220 | 57 | 52 | 31 | 34 | 27 |
Change in fair value of preferred stock warrant liability | ||||||||
0 | 0 | 0 | 614 | -273 | 122 | 183 | 210 | 30 |
Non-cash interest expense and end of term accretion expense | ||||||||
123 | - | - | - | 115 | - | - | - | - |
Non-cash interest expense | ||||||||
- | - | - | - | - | - | 68 | -12 | 60 |
Net amortization of premiums on marketable securities | ||||||||
1 | - | - | - | - | 0 | 0 | 0 | 9 |
Unrealized foreign currency transaction losses | ||||||||
-78 | - | - | - | -160 | -160 | 20 | -153 | 143 |
Changes in operating assets and liabilities: | ||||||||
Accounts receivable | ||||||||
-422 | 68 | -583 | 1,935 | 1,746 | -466 | 1,156 | 802 | 1,021 |
Inventory | ||||||||
241 | 883 | 12 | 758 | 2,468 | -119 | 790 | 850 | 1,178 |
Prepaid expenses and other current assets | ||||||||
120 | -564 | 573 | 158 | -417 | 1,172 | 125 | -85 | 143 |
Accounts payable | ||||||||
-2,411 | 2,389 | -388 | 684 | 758 | 917 | 20 | 70 | -843 |
Accrued expenses and other current liabilities | ||||||||
1,806 | -501 | 2,138 | -1,578 | 2,394 | 533 | 716 | -603 | 1,692 |
Deferred revenue | ||||||||
- | 0 | -6 | -187 | 57 | 121 | -17 | -33 | -4 |
Deferred rent | ||||||||
-262 | 88 | 87 | 87 | 87 | 83 | 82 | 82 | 82 |
Net cash used in operating activities | ||||||||
-8,176 | -7,264 | -5,597 | -12,159 | -7,266 | -6,120 | -6,064 | -7,469 | -6,331 |
Cash flows from investing activities: | ||||||||
Purchases of property and equipment | ||||||||
277 | -19 | 33 | 148 | 3 | 134 | 244 | 0 | 40 |
Purchases of marketable securities | ||||||||
4,168 | - | - | - | - | - | - | - | - |
Proceeds from sales and maturities of marketable securities | ||||||||
17,160 | - | - | - | - | 0 | 750 | 6,975 | 5,000 |
Net cash provided by (used in) investing activities | ||||||||
12,715 | 7,360 | -18,765 | -49,093 | -3 | -134 | 506 | 6,975 | 4,960 |
Cash flows from financing activities: | ||||||||
Payments of initial public offering costs and other financing costs | ||||||||
120 | - | - | 1,275 | 705 | - | - | - | - |
Repayments of long-term debt | ||||||||
- | - | - | - | - | 0 | 0 | 8,184 | 892 |
Proceeds from issuance of common stock upon exercise of stock options | ||||||||
75 | 94 | 98 | 2 | 8 | 1 | 24 | 9 | 12 |
Proceeds from issuance of common stock in connection with employee stock purchase plan | ||||||||
197 | - | - | - | - | - | - | - | - |
Net cash provided by (used in) financing activities | ||||||||
152 | -246 | -2,428 | 96,094 | -697 | -2,280 | -37 | 25,261 | -880 |
Effect of exchange rate changes on cash, cash equivalents and restricted cash | ||||||||
-45 | -165 | -45 | 185 | -60 | -115 | 46 | -127 | 114 |
Net increase (decrease) in cash, cash equivalents and restricted cash | ||||||||
4,646 | -315 | -26,835 | 35,027 | -8,026 | -8,649 | -5,549 | 24,640 | -2,137 |
Supplemental disclosure of non-cash investing and financing activities: | ||||||||
Transfers of inventory to property and equipment | ||||||||
78 | 242 | 641 | 856 | 407 | 225 | 174 | 652 | 342 |
Purchases of property and equipment included in accounts payable | ||||||||
112 | 79 | 71 | -110 | 129 | - | - | - | 4 |
Offering costs included in accounts payable and accrued expenses | ||||||||
- | - | - | - | 1,134 | - | - | - | - |