| Mar'20 | Dec'19 | Sep'19 | Jun'19 | Mar'19 | Dec'18 | Sep'18 | Jun'18 | Mar'18 | Dec'17 | Sep'17 | Jun'17 | Mar'17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Operating activities | ||||||||||||
Net loss | ||||||||||||
-16,245 | -9,080 | -8,247 | -7,650 | -8,266 | -4,778 | -4,693 | -5,856 | -6,501 | -4,251 | -4,023 | -4,756 | -4,481 |
Adjustments to reconcile net loss: | ||||||||||||
Depreciation and amortization | ||||||||||||
187 | 153 | 133 | 106 | 103 | 105 | 100 | 98 | 90 | 111 | 75 | 56 | 43 |
Accretion of investment discount | ||||||||||||
80 | 137 | 237 | 300 | 309 | 648 | 0 | 0 | 0 | - | - | - | - |
Accretion of debt discount | ||||||||||||
54 | 54 | 53 | 51 | 110 | 112 | 117 | 126 | 213 | 84 | 85 | 85 | 61 |
Non-cash lease expense | ||||||||||||
243 | - | - | - | 204 | - | - | - | - | - | - | - | - |
Stock-based compensation expense | ||||||||||||
2,749 | 1,893 | 1,524 | 1,389 | 1,391 | 523 | 372 | 269 | 55 | 54 | 81 | 54 | 54 |
Non-cash stock issuance for services rendered | ||||||||||||
72 | 59 | 58 | 58 | 58 | 58 | 37 | 0 | 0 | - | - | - | - |
Change in the fair value of preferred stock warrants | ||||||||||||
- | - | - | - | - | 0 | 0 | 123 | -718 | - | - | - | - |
Other, net | ||||||||||||
89 | 0 | 2 | 0 | 141 | -51 | 0 | 0 | 0 | - | - | - | - |
Changes in operating assets and liabilities: | ||||||||||||
Accounts receivable | ||||||||||||
-2,092 | 2,102 | 1,577 | 2,416 | 385 | 1,284 | 922 | 1,029 | -399 | 662 | 681 | 236 | 188 |
Inventories | ||||||||||||
1,411 | 1,159 | 1,114 | 455 | 439 | -408 | -473 | 154 | -276 | 627 | 33 | -183 | -162 |
Prepaid expenses and other current assets | ||||||||||||
-775 | -961 | -2,375 | 4,453 | -212 | 708 | 11 | -1,154 | 1,761 | 215 | 24 | 22 | 47 |
Accounts payable | ||||||||||||
1,372 | -410 | 2,189 | -523 | -222 | 988 | 204 | -1,671 | 918 | 1,380 | 268 | 50 | 127 |
Accrued expenses and other liabilities | ||||||||||||
-4,494 | 2,788 | 1,901 | 1,513 | -3,258 | 2,584 | 770 | 1,052 | -825 | 749 | 1,125 | 559 | -1,091 |
Net cash used in operating activities | ||||||||||||
-14,775 | -6,076 | -2,944 | -12,884 | -10,942 | -2,589 | -3,553 | -6,134 | -6,418 | -3,277 | -3,127 | -4,027 | -5,360 |
Investing activities | ||||||||||||
Purchases of property and equipment | ||||||||||||
255 | 442 | 1,064 | 958 | 275 | 191 | 0 | 52 | 7 | 62 | 124 | 20 | 206 |
Purchases of investments | ||||||||||||
14,907 | 34,550 | 42,487 | 60,464 | 40,573 | 16,545 | 93,798 | 496 | 4,642 | - | - | - | - |
Proceeds from sales or maturities of investments | ||||||||||||
82,403 | 15,000 | 43,050 | 22,400 | 56,804 | 20,358 | 1,764 | 5,146 | 5,074 | - | - | - | - |
Net cash provided by investing activities | ||||||||||||
67,241 | -19,992 | -501 | -39,022 | 15,956 | 3,622 | -92,034 | 4,598 | 425 | -2,448 | -4,926 | -20 | -206 |
Financing activities | ||||||||||||
Proceeds from issuance of notes payable | ||||||||||||
- | - | - | - | - | 0 | 0 | 0 | 8,000 | 0 | 0 | 0 | 458 |
Payment of debt fees | ||||||||||||
0 | 0 | 0 | 0 | 531 | 0 | 0 | 0 | 0 | - | - | - | - |
Proceeds from the exercise of stock options and warrants | ||||||||||||
787 | 179 | 192 | 604 | 165 | 127 | 45 | 201 | 185 | 140 | 86 | 3 | 6 |
Proceeds from sale of preferred stock | ||||||||||||
- | - | - | - | - | - | - | - | - | 0 | 0 | 0 | 24,968 |
Net cash provided by (used in) financing activities | ||||||||||||
787 | 897 | 192 | 1,241 | -366 | 69,910 | 46 | 112,242 | 8,185 | 140 | 86 | 3 | 25,432 |
Effect of exchange rate on cash | ||||||||||||
4 | -13 | 29 | -12 | 9 | 33 | 0 | 0 | 0 | - | - | - | - |
Increase in cash and cash equivalents | ||||||||||||
53,257 | -25,184 | -3,224 | -50,677 | 4,657 | 70,976 | -95,541 | 110,706 | 2,192 | -5,585 | -7,967 | -4,044 | 19,866 |
Supplemental cash flow information | ||||||||||||
Cash paid for interest | ||||||||||||
471 | 471 | 475 | 316 | 771 | 566 | 560 | 546 | 347 | 339 | 341 | 335 | 308 |
Issuance of preferred stock warrants | ||||||||||||
- | - | - | - | - | 0 | 0 | 0 | 103 | 0 | 0 | 0 | 4 |