| Mar'20 | Dec'19 | Sep'19 | Jun'19 | Mar'19 | Dec'18 | Sep'18 | Jun'18 | Mar'18 | Dec'17 |
|---|---|---|---|---|---|---|---|---|---|
Cash flows from operating activities | |||||||||
Net loss | |||||||||
-31,768 | -55,638 | -31,181 | -27,916 | -25,933 | -22,639 | -19,802 | -17,624 | -16,873 | -16,937 |
Adjustments to reconcile net loss to net cash used in operating activities | |||||||||
Depreciation and amortization | |||||||||
1,559 | 1,505 | 1,489 | 1,587 | 1,563 | 1,472 | 1,329 | 1,697 | 1,415 | 1,286 |
Loss on disposal of property and equipment | |||||||||
- | - | 13 | -194 | 0 | -8 | - | - | - | - |
Non-cash lease expense | |||||||||
-463 | 236 | - | - | - | - | - | - | - | - |
Stock-based compensation | |||||||||
4,197 | 3,697 | 3,363 | 3,032 | 2,911 | 1,864 | 1,086 | 603 | 736 | 536 |
Discount accretion on investment securities | |||||||||
82 | 150 | - | - | - | - | - | - | - | - |
Non-cash interest expense | |||||||||
41 | 46 | 51 | 57 | 61 | 64 | 104 | 63 | 70 | 17 |
Change in fair value of redeemable convertible preferred stock warrant liability | |||||||||
- | - | - | - | - | - | -79 | 20 | 48 | -2 |
Amortization of debt discount | |||||||||
49 | 56 | 63 | 67 | 74 | 78 | 78 | 77 | 60 | 93 |
Changes in assets and liabilities: | |||||||||
Accounts receivable, net | |||||||||
1,777 | 950 | 577 | 3,529 | 1,020 | 1,559 | 1,130 | 273 | 993 | 677 |
Inventories | |||||||||
3,347 | 86 | 1,834 | 1,047 | -1,112 | -467 | 1,776 | 1,139 | 841 | 446 |
Prepaid expenses and other current assets | |||||||||
-964 | 2,917 | -868 | -609 | 365 | 366 | 964 | 304 | 582 | -90 |
Other non-current assets | |||||||||
258 | -62 | 1,622 | 251 | -201 | 392 | -640 | 1,193 | 148 | 111 |
Accounts payable | |||||||||
-2,519 | -556 | 3,374 | 1,921 | -1,302 | -715 | 2,220 | 232 | 353 | 954 |
Accrued expenses | |||||||||
-1,758 | -1,279 | 2,249 | 1,303 | 619 | 39 | -632 | 448 | 732 | -662 |
Accrued compensation | |||||||||
-219 | -1,629 | 585 | 2,440 | 2,175 | -140 | 2,022 | 343 | -361 | -72 |
Accrued litigation settlement | |||||||||
- | 22,500 | - | - | - | - | - | - | - | - |
Other liabilities | |||||||||
-790 | 189 | 108 | -102 | -388 | 135 | 208 | 89 | -162 | -85 |
Net cash used in operating activities | |||||||||
-58,671 | -34,914 | -23,358 | -22,082 | -20,813 | -21,684 | -16,696 | -16,942 | -16,510 | -16,016 |
Cash flows from investing activities | |||||||||
Purchases of property and equipment | |||||||||
2,737 | 2,058 | 3,893 | 5,172 | 3,770 | 1,922 | 1,047 | 629 | 501 | 1,511 |
Purchases of investments | |||||||||
0 | 6,537 | 40,310 | 50,639 | 22,790 | 63,835 | 149 | 0 | 0 | 3,374 |
Proceeds from maturity of investments | |||||||||
31,500 | 21,000 | - | - | - | - | 1,600 | 5,200 | 14,600 | 13,100 |
Net cash provided by (used in) investing activities | |||||||||
28,763 | 12,405 | -1,187 | -22,706 | -15,160 | -65,757 | 404 | 4,580 | 14,107 | 8,215 |
Cash flows from financing activities | |||||||||
Proceeds from exercise of stock options | |||||||||
1,387 | 1,674 | 1,061 | 864 | 25 | 220 | 40 | 9 | 140 | 142 |
Proceeds from public offering, net of underwriting discounts and commissions and offering expenses | |||||||||
186,352 | 2,024 | 0 | 84,255 | -826 | 72,779 | - | - | - | - |
Proceeds from issuance of Series D redeemable convertible preferred stock, net of issuance costs | |||||||||
- | - | - | - | - | - | 6,977 | 24,911 | 55,972 | 2,990 |
Payments of deferred offering costs | |||||||||
- | - | - | - | - | - | 434 | 90 | 1,365 | 470 |
Repayments of long-term debt | |||||||||
834 | 833 | - | - | - | - | - | - | - | - |
Repurchases of common stock for income tax withholding | |||||||||
390 | 808 | - | - | - | - | - | - | - | - |
Net cash provided by financing activities | |||||||||
188,037 | 2,057 | 2,928 | 84,285 | -1,634 | 72,999 | 6,583 | 24,830 | 54,747 | 2,662 |
Effect of exchange rates on cash, cash equivalents and restricted cash | |||||||||
-27 | 9 | - | - | - | - | - | - | - | - |
Net increase (decrease) in cash, cash equivalents and restricted cash | |||||||||
158,102 | -20,443 | -21,587 | 39,497 | -37,607 | -14,442 | -9,709 | 12,468 | 52,344 | -5,139 |
Supplemental disclosure of cash flow information | |||||||||
Interest paid | |||||||||
125 | 146 | 174 | 192 | 206 | 207 | 164 | 197 | 187 | 203 |
Income taxes paid, net of refunds | |||||||||
76 | 44 | 70 | 60 | 108 | 53 | 159 | 8 | 7 | 5 |
Non-cash investing and financing activities | |||||||||
Property and equipment additions included in accrued expenses and accounts payable | |||||||||
708 | 66 | -1,103 | 1,087 | -931 | 1,117 | - | - | -202 | 226 |
Operating lease right-of-use assets obtained in exchange for operating lease liabilities | |||||||||
0 | 2,833 | - | - | - | - | - | - | - | - |
Offering expenses included in accounts payable and accrued expenses | |||||||||
- | - | - | - | -806 | 826 | 792 | 476 | -47 | 87 |
Conversion of redeemable convertible preferred stock warrant liability to equity | |||||||||
- | - | 0 | 0 | 0 | 631 | - | - | - | - |
Conversion of redeemable convertible preferred stock to common stock | |||||||||
- | - | 0 | 0 | 0 | 290,462 | - | - | - | - |