| 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 | ||||||||
-16,598 | -17,840 | -18,980 | -21,932 | -21,024 | -23,123 | -18,391 | -18,900 | -16,520 |
Adjustments to reconcile net loss to net cash used in operating activities: | ||||||||
Depreciation and amortization expense | ||||||||
400 | 344 | 467 | 433 | 400 | 400 | 400 | 370 | 330 |
Non-cash lease expense | ||||||||
314 | 306 | 300 | 293 | 287 | - | - | - | 0 |
Net amortization of premiums and discounts on marketable securities | ||||||||
0 | 0 | -13 | -13 | 21 | 0 | 200 | -37 | -159 |
Stock-based compensation expense | ||||||||
1,669 | 1,523 | 2,034 | 2,054 | 1,729 | 1,514 | 1,643 | 1,422 | 1,650 |
Loss on disposal of property and equipment | ||||||||
- | - | - | - | - | -4 | -11 | -1 | -9 |
Changes in operating assets and liabilities: | ||||||||
Prepaid expenses and other current assets | ||||||||
114 | -188 | 38 | -351 | 233 | -153 | 515 | -100 | 78 |
Other long-term assets | ||||||||
-6 | -7 | -7 | -6 | 42 | 0 | 0 | 0 | -125 |
Accounts payable | ||||||||
1,341 | -233 | -816 | -1,262 | 0 | 1,461 | 1,622 | -1,040 | -92 |
Accrued expenses and other liabilities | ||||||||
-1,027 | 496 | 597 | 203 | -2,012 | 1,713 | -534 | 3,395 | -512 |
Lease liabilities | ||||||||
-295 | -288 | -267 | -260 | -254 | - | - | - | 0 |
Net cash used in operating activities | ||||||||
-14,280 | -15,463 | -16,713 | -20,081 | -21,155 | -17,886 | -15,990 | -14,623 | -14,929 |
Cash flows from investing activities: | ||||||||
Purchases of marketable securities | ||||||||
- | - | - | - | - | 0 | 60,949 | 0 | 11,990 |
Sales and maturities of marketable securities | ||||||||
0 | 0 | 14,700 | 17,281 | 18,700 | 10,300 | 7,800 | 9,800 | 15,650 |
Purchases of property and equipment | ||||||||
9 | -183 | 62 | 179 | 1,026 | 614 | 333 | 817 | 1,458 |
Net cash (used in) provided by investing activities | ||||||||
-9 | 183 | 14,638 | 17,102 | 17,674 | 9,686 | -53,482 | 8,983 | 2,202 |
Cash flows from financing activities: | ||||||||
Proceeds from exercise of stock options | ||||||||
0 | 0 | 70 | 0 | 45 | 5 | 171 | 228 | 0 |
Payments for repurchase of common stock for employee tax withholdings | ||||||||
59 | - | - | - | 0 | - | - | - | - |
Payment of initial public offering costs | ||||||||
- | - | - | - | - | 35 | 723 | 1,216 | 1,091 |
Net cash (used in) provided by financing activities | ||||||||
-59 | 397 | 68 | 0 | 45 | -30 | -553 | 92,012 | -1,091 |
Net decrease in cash, cash equivalents and restricted cash | ||||||||
-14,348 | -14,883 | -2,007 | -2,979 | -3,436 | -8,230 | -70,025 | 86,372 | -13,818 |
Supplemental disclosure of non-cash items: | ||||||||
Accretion of redeemable convertible preferred stock to redemption value | ||||||||
- | - | - | - | - | 0 | 0 | 3,185 | 3,186 |
Deferred offering costs included in accounts payable and accrued expenses | ||||||||
- | - | - | - | - | - | - | 0 | 1,003 |
Purchases of property and equipment included in accounts payable and accrued expenses | ||||||||
0 | 0 | 0 | -168 | 168 | 25 | 400 | -347 | 419 |