| Mar'20 | Dec'19 | Sep'19 | Jun'19 | Mar'19 | Dec'18 | Sep'18 | Jun'18 | Mar'18 |
|---|---|---|---|---|---|---|---|---|
Operating activities: | ||||||||
Net loss | ||||||||
-72,604 | -53,792 | -19,491 | 9,488 | 4,170 | 18,167 | 0 | 0 | 0 |
Adjustments to reconcile net loss to net cash used in operating activities: | ||||||||
Change in fair value of convertible preferred stock warrant liability | ||||||||
- | - | - | - | - | 577 | 0 | 0 | 0 |
Amortization of discount on marketable securities | ||||||||
1,384 | 1,563 | 1,547 | 1,349 | 913 | 387 | 0 | 0 | 0 |
Depreciation | ||||||||
1,988 | 1,832 | 1,413 | 980 | 552 | 252 | 0 | 0 | 0 |
Stock-based compensation | ||||||||
14,366 | 12,182 | 10,310 | 7,744 | 4,640 | 2,801 | 0 | 0 | 0 |
Deferred rent | ||||||||
-797 | -325 | 224 | 965 | 1,217 | 745 | 0 | 0 | 0 |
Non-cash lease expense | ||||||||
0 | - | - | - | 0 | - | - | - | - |
Changes in operating assets and liabilities: | ||||||||
Prepaid expenses and other assets | ||||||||
1,333 | 400 | -618 | -8,994 | 2,236 | 2,187 | 0 | 0 | 0 |
Deferred revenue | ||||||||
0 | -5,160 | -21,297 | -34,861 | -37,848 | -44,137 | 0 | 0 | 0 |
Accounts payable | ||||||||
-2,274 | -2,082 | -1,919 | 1,142 | 1,980 | 1,034 | 0 | 0 | 0 |
Accrued liabilities | ||||||||
8,715 | 6,762 | 5,046 | 4,893 | 1,629 | 1,962 | 0 | 0 | 0 |
Lease liability | ||||||||
0 | - | - | - | 0 | - | - | - | - |
Net cash used in operating activities | ||||||||
-53,612 | -42,546 | -26,643 | -1,936 | -26,554 | -21,173 | 0 | 0 | 0 |
Investing activities: | ||||||||
Purchases of property and equipment | ||||||||
973 | 2,171 | 2,766 | 2,612 | 2,290 | 1,067 | 0 | 0 | 0 |
Maturities of marketable securities | ||||||||
250,267 | 199,916 | 157,560 | 117,035 | 47,910 | 13,500 | 0 | 0 | 0 |
Purchases of marketable securities | ||||||||
381,577 | 380,368 | 248,402 | 244,464 | 195,835 | 159,299 | 0 | 0 | 0 |
Net cash provided by (used in) investing activities | ||||||||
-132,283 | -182,623 | -93,608 | -130,041 | -150,215 | -146,866 | 0 | 0 | 0 |
Financing activities: | ||||||||
Net proceeds from equity offerings | ||||||||
- | - | - | - | - | - | - | - | 0 |
Proceeds from issuances of common stock upon exercise of options and participation in employee stock purchase plan | ||||||||
4,178 | 3,661 | 0 | 0 | 0 | - | - | - | - |
Net cash provided by financing activities | ||||||||
230,652 | 230,135 | 527 | 163,029 | 161,822 | 161,941 | 0 | 0 | 0 |
Net increase (decrease) in cash, cash equivalents and restricted cash | ||||||||
44,757 | 4,966 | -119,724 | 31,052 | -14,947 | -6,098 | 0 | 0 | 0 |
Supplemental disclosures of cash flow information | ||||||||
Non cash tenant improvement allowance used for leasehold improvements | ||||||||
0 | 8,324 | 0 | 8,324 | 8,324 | 0 | 0 | 0 | 0 |
Purchases of property and equipment accrued but not yet paid | ||||||||
-293 | 0 | 578 | 799 | 791 | 642 | 0 | 0 | 0 |