| Dec'19 | Dec'18 | Dec'17 | Dec'16 | |||
|---|---|---|---|---|---|---|
Cash Flows From Operating Activities: | ||||||
Net loss | ||||||
-37,835 | -40,725 | -11,941 | -2,542 | |||
Adjustments to reconcile net loss to net cash used in operating activities: | ||||||
Depreciation and amortization | ||||||
77 | 56 | 4 | 0 | |||
Stock-based compensation expense | ||||||
5,373 | 2,526 | 1,148 | 107 | |||
Accrued interest on Convertible Promissory Notes payable | ||||||
- | 48 | - | 1 | |||
Change in fair value of derivative liability | ||||||
-17 | 100 | - | -6 | |||
Change in fair value of redeemable convertible preferred stock tranche liabilities | ||||||
- | -630 | 75 | -151 | |||
Change in fair value of redeemable convertible preferred stock warrant liability | ||||||
- | -2,628 | - | - | |||
Issuance of common stock in exchange for services and technology | ||||||
- | 7 | 5 | 9 | |||
Amortization of debt discount | ||||||
108 | 963 | - | - | |||
Loss on disposal of asset | ||||||
-59 | - | - | - | |||
Gain on extinguishment of leasehold liability | ||||||
69 | - | - | - | |||
Changes in assets and liabilities: | ||||||
Related party receivable | ||||||
51 | -33 | 62 | 5 | |||
Prepaid expenses and other current assets | ||||||
2,889 | 1,305 | 477 | 7 | |||
Other assets | ||||||
5,708 | 752 | 174 | 7 | |||
Accounts payable | ||||||
1,195 | 1,390 | 472 | 52 | |||
Accrued expenses and other liabilities | ||||||
8,015 | 1,416 | 1,070 | 117 | |||
Related party payable | ||||||
60 | -116 | 313 | 59 | |||
Net cash used in operating activities | ||||||
-31,648 | -33,301 | -9,717 | -2,059 | |||
Cash Flows From Investing Activities: | ||||||
Purchases of property and equipment | ||||||
227 | 150 | 53 | - | |||
Net cash used in investing activities | ||||||
-227 | -150 | -53 | - | |||
Cash Flows From Financing Activities: | ||||||
Proceeds from issuance of redeemable convertible preferred stock, net of issuance costs | ||||||
- | 63,875 | 12,993 | 3,927 | |||
Proceeds from long-term debt, net of debt discount and issuance costs | ||||||
17,500 | - | - | - | |||
Payment of deferred financing costs | ||||||
348 | - | - | - | |||
Proceeds from issuance of Convertible Promissory Notes payable | ||||||
- | 10,000 | - | - | |||
Proceeds from issuance of common stock under employee stock plan | ||||||
487 | 160 | - | - | |||
Proceeds from issuance of common stock upon exercise of stock options and restricted stock | ||||||
1,010 | 96 | 318 | - | |||
Proceeds from the issuance of common stock in at-the-market offering | ||||||
- | - | - | 63 | |||
Proceeds from issuance of common stock in initial public offering, net of issuance costs | ||||||
- | 110,970 | - | - | |||
Net cash provided by financing activities | ||||||
65,885 | 185,101 | 13,311 | 3,990 | |||
Net increase (decrease) in cash and cash equivalents | ||||||
34,010 | 151,650 | 3,541 | 1,931 | |||
Other supplemental information | ||||||
Interest paid | ||||||
74 | - | - | - | |||
Supplemental disclosure of non-cash activities: | ||||||
Settlement of redeemable convertible preferred stock tranche liability through issuance of preferred stock | ||||||
- | 694 | 240 | 123 | |||
Lease liability arising from the right of use asset | ||||||
5,155 | - | - | - | |||
Vesting of restricted stock and early exercised options | ||||||
149 | 170 | 38 | - | |||
Conversion of Convertible Promissory Notes payable and accrued interest into redeemable convertible preferred stock | ||||||
- | 14,354 | - | 32 | |||
Conversion of redeemable convertible preferred stock to common stock at closing of initial public offering | ||||||
- | 95,887 | - | - | |||
Reclassification of redeemable convertible preferred stock warrant liability to common stock at closing of initial public offering | ||||||
- | 3,506 | - | - | |||
Embedded derivative liability | ||||||
1,147 | - | - | - | |||
Tenant improvements paid by landlord | ||||||
959 | - | - | - | |||
Open Market Sale Agreement | ||||||
Proceeds from the issuance of common stock in at-the-market offering | ||||||
23,900 | - | - | - | |||
Alexion | ||||||
Proceeds from the issuance of common stock | ||||||
23,309 | - | - | - | |||