| 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 | ||||||||
-9,941 | -8,291 | -8,007 | -11,959 | -24,158 | -15,619 | -8,953 | -7,650 | -5,408 |
Adjustments to reconcile net loss to net cash used in operating activities: | ||||||||
Depreciation and amortization expense | ||||||||
184 | 182 | 180 | 176 | 174 | 192 | 194 | 74 | 57 |
Stock-based compensation expense | ||||||||
1,293 | 954 | 924 | 837 | 262 | 226 | 194 | 329 | 162 |
Change in fair value of redeemable convertible preferred stock warrant liability | ||||||||
0 | 0 | 0 | 5,318 | 15,712 | 6,999 | 3,229 | 1,894 | -216 |
Amortization of premium on investments | ||||||||
-79 | - | - | - | 0 | - | - | - | - |
Amortization of debt discount and debt issuance costs | ||||||||
12 | 12 | 12 | 11 | 11 | 11 | 11 | 23 | 23 |
Amortization of right-of-use asset | ||||||||
146 | 142 | 140 | 138 | 162 | - | - | - | - |
Non-cash interest expense | ||||||||
83 | 77 | 40 | 84 | 471 | 402 | 371 | 396 | 386 |
Change in provision for doubtful accounts receivable | ||||||||
-9 | -1,140 | 439 | 727 | -3 | -1,378 | 592 | 385 | 278 |
Provision for excess and obsolete inventories | ||||||||
92 | 40 | 35 | 16 | 27 | 23 | 0 | 0 | 0 |
Changes in assets and liabilities | ||||||||
Accounts receivable | ||||||||
60 | -1,334 | 1,953 | 1,779 | -157 | -1,069 | 1,990 | 1,537 | -2,012 |
Inventories | ||||||||
1,871 | 1,087 | 347 | 923 | 2,339 | 640 | 871 | 621 | 433 |
Prepaid expenses and other current assets | ||||||||
-983 | -625 | 255 | 1,857 | -16 | 691 | -41 | 91 | 387 |
Other assets | ||||||||
-55 | 212 | -8 | -1,407 | 651 | 4 | 6 | 69 | -17 |
Accounts payable | ||||||||
1,274 | -97 | 757 | -2,332 | 2,287 | 256 | -589 | 268 | -244 |
Accrued liabilities | ||||||||
-3,912 | 2,709 | 1,878 | 56 | 321 | 3,644 | 1,209 | 1,067 | -897 |
Other liabilities | ||||||||
-203 | -200 | -197 | 697 | -1,069 | -39 | 201 | 244 | 0 |
Net cash used in operating activities | ||||||||
-11,795 | -5,261 | -6,346 | -9,383 | -8,620 | -5,390 | -6,367 | -5,288 | -4,650 |
Cash flows from investing activities | ||||||||
Purchases of property and equipment | ||||||||
134 | 198 | 131 | 89 | 117 | 108 | 1,164 | 549 | 455 |
Purchases of investments | ||||||||
1,974 | - | - | - | 0 | - | - | - | - |
Proceeds from maturity of investments | ||||||||
2,000 | - | - | - | 0 | - | - | - | - |
Net cash used in investing activities | ||||||||
-108 | -69,619 | -131 | -89 | -117 | -102 | -1,164 | -549 | -455 |
Cash flows from financing activities | ||||||||
Payment of deferred offering costs | ||||||||
0 | - | - | - | 1,149 | - | - | - | 0 |
Proceeds from issuance of common stock | ||||||||
274 | 1,784 | 68 | 363 | 375 | 7 | 217 | 148 | 284 |
Proceeds from exercise of redeemable convertible preferred stock warrants | ||||||||
- | - | - | - | - | - | - | - | 0 |
Net cash provided by (used in) financing activities | ||||||||
274 | 1,784 | 507 | 112,210 | -744 | -226 | 15,218 | 148 | 284 |
Net change in cash, cash equivalents and restricted cash | ||||||||
-11,629 | -73,096 | -5,970 | 102,738 | -9,481 | -5,718 | 7,687 | -5,689 | -4,821 |
Supplemental disclosure of cash flow information | ||||||||
Cash paid for interest | ||||||||
1,108 | 1,127 | 1,125 | 1,112 | 870 | 883 | 683 | 592 | 580 |
Non-cash investing and financing activities: | ||||||||
Accounts payable and accrued liabilities for purchases of property and equipment | ||||||||
22 | 23 | 2 | -15 | 22 | -20 | -670 | 606 | 90 |
Offering costs in accounts payable and accrued liabilities | ||||||||
0 | - | - | -846 | 1,204 | - | - | 0 | 0 |
Right-of-use asset obtained in exchange for lease obligation | ||||||||
0 | 0 | 0 | 0 | 3,982 | - | - | - | - |
Redeemable Convertible Preferred Stock | ||||||||
Proceeds from exercise of redeemable convertible preferred stock warrants | ||||||||
0 | 0 | 0 | 1,754 | 30 | - | - | - | - |