| 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 | ||||||||||||
-41,222 | -33,243 | -28,941 | -25,387 | -23,593 | -21,828 | -21,301 | -20,631 | -19,531 | -17,511 | 0 | 0 | 0 |
Adjustments to reconcile net loss: | ||||||||||||
Depreciation and amortization | ||||||||||||
579 | 495 | 447 | 414 | 406 | 393 | 399 | 374 | 332 | 285 | 0 | 0 | 0 |
Accretion of investment discount | ||||||||||||
754 | 983 | 1,494 | 1,257 | 957 | 648 | 0 | 0 | 0 | - | - | - | - |
Accretion of debt discount | ||||||||||||
212 | 268 | 326 | 390 | 465 | 568 | 540 | 508 | 467 | 315 | 0 | 0 | 0 |
Non-cash lease expense | ||||||||||||
0 | - | - | - | 0 | - | - | - | - | - | - | - | - |
Stock-based compensation expense | ||||||||||||
7,555 | 6,197 | 4,827 | 3,675 | 2,555 | 1,219 | 750 | 459 | 244 | 243 | 0 | 0 | 0 |
Non-cash stock issuance for services rendered | ||||||||||||
247 | 233 | 232 | 211 | 153 | 95 | 0 | 0 | 0 | - | - | - | - |
Change in the fair value of preferred stock warrants | ||||||||||||
- | - | - | - | - | -595 | 0 | 0 | 0 | - | - | - | - |
Other, net | ||||||||||||
91 | 143 | 92 | 90 | 90 | -51 | 0 | 0 | 0 | - | - | - | - |
Changes in operating assets and liabilities: | ||||||||||||
Accounts receivable | ||||||||||||
4,003 | 6,480 | 5,662 | 5,007 | 3,620 | 2,836 | 2,214 | 1,973 | 1,180 | 1,767 | 0 | 0 | 0 |
Inventories | ||||||||||||
4,139 | 3,167 | 1,600 | 13 | -288 | -1,003 | 32 | 538 | 201 | 315 | 0 | 0 | 0 |
Prepaid expenses and other current assets | ||||||||||||
342 | 905 | 2,574 | 4,960 | -647 | 1,326 | 833 | 846 | 2,022 | 308 | 0 | 0 | 0 |
Accounts payable | ||||||||||||
2,628 | 1,034 | 2,432 | 447 | -701 | 439 | 831 | 895 | 2,616 | 1,825 | 0 | 0 | 0 |
Accrued expenses and other liabilities | ||||||||||||
1,708 | 2,944 | 2,740 | 1,609 | 1,148 | 3,581 | 1,746 | 2,101 | 1,608 | 1,342 | 0 | 0 | 0 |
Net cash used in operating activities | ||||||||||||
-36,679 | -32,846 | -29,359 | -29,968 | -23,218 | -18,694 | -19,382 | -18,956 | -16,849 | -15,791 | 0 | 0 | 0 |
Investing activities | ||||||||||||
Purchases of property and equipment | ||||||||||||
2,719 | 2,739 | 2,488 | 1,424 | 518 | 250 | 121 | 245 | 213 | 412 | 0 | 0 | 0 |
Purchases of investments | ||||||||||||
152,408 | 178,074 | 160,069 | 211,380 | 151,412 | 115,481 | 0 | 0 | 0 | - | - | - | - |
Proceeds from sales or maturities of investments | ||||||||||||
162,853 | 137,254 | 142,612 | 101,326 | 84,072 | 32,342 | 0 | 0 | 0 | - | - | - | - |
Net cash provided by investing activities | ||||||||||||
7,726 | -43,559 | -19,945 | -111,478 | -67,858 | -83,389 | -89,459 | -2,351 | -6,969 | -7,600 | 0 | 0 | 0 |
Financing activities | ||||||||||||
Proceeds from issuance of notes payable | ||||||||||||
- | - | - | - | - | 8,000 | 8,000 | 8,000 | 8,000 | 458 | 0 | 0 | 0 |
Payment of debt fees | ||||||||||||
0 | 531 | 531 | 531 | 531 | 0 | 0 | 0 | 0 | - | - | - | - |
Proceeds from the exercise of stock options and warrants | ||||||||||||
1,762 | 1,140 | 1,088 | 941 | 538 | 558 | 571 | 612 | 414 | 235 | 0 | 0 | 0 |
Proceeds from sale of preferred stock | ||||||||||||
- | - | - | - | - | - | - | - | - | 24,968 | 0 | 0 | 0 |
Net cash provided by (used in) financing activities | ||||||||||||
3,117 | 1,964 | 70,977 | 70,831 | 181,832 | 190,383 | 120,613 | 120,653 | 8,414 | 25,661 | 0 | 0 | 0 |
Effect of exchange rate on cash | ||||||||||||
8 | 13 | 59 | 30 | 42 | 33 | 0 | 0 | 0 | - | - | - | - |
Increase in cash and cash equivalents | ||||||||||||
-25,828 | -74,428 | 21,732 | -70,585 | 90,798 | 88,333 | 11,772 | 99,346 | -15,404 | 2,270 | 0 | 0 | 0 |
Supplemental cash flow information | ||||||||||||
Cash paid for interest | ||||||||||||
1,733 | 2,033 | 2,128 | 2,213 | 2,443 | 2,019 | 1,792 | 1,573 | 1,362 | 1,323 | 0 | 0 | 0 |
Issuance of preferred stock warrants | ||||||||||||
- | - | - | - | - | 103 | 103 | 103 | 103 | 4 | 0 | 0 | 0 |