| Dec'19 | Dec'18 | Dec'17 | Dec'16 | Dec'15 | Dec'14 | Dec'13 | Dec'12 | Dec'11 | Dec'10 |
|---|---|---|---|---|---|---|---|---|---|
Cash flows from operating activities: | |||||||||
Net loss | |||||||||
-344,681 | -309,242 | -360,367 | -412,830 | -226,429 | -283,226 | -67,792 | -43,643 | -12,737 | -15,087 |
Adjustments to reconcile net loss to net cash used in operating activities: | |||||||||
Foreign currency loss on liquidation | |||||||||
- | - | - | - | - | - | - | -191 | 0 | 0 |
Revaluation of warrants | |||||||||
- | - | - | - | - | 170,832 | 28,441 | 24,625 | -1,044 | -672 |
Stock-based compensation | |||||||||
55,982 | 49,914 | 56,968 | 46,205 | 34,189 | 20,127 | 9,446 | 3,348 | 1,865 | 1,692 |
(Accretion) amortization of (discount) premium on investment debt securities | |||||||||
302 | 33 | -3,429 | -4,939 | 6,302 | 3,366 | 1,615 | 118 | 0 | 0 |
Amortization of deferred financing costs | |||||||||
2,130 | 1,542 | 1,417 | 685 | - | - | - | - | - | - |
Realized loss on investments | |||||||||
- | -8 | - | -48 | - | - | - | - | - | - |
Loss from sale of assets | |||||||||
- | - | - | - | - | - | - | - | -217 | 0 |
Depreciation | |||||||||
3,700 | 4,600 | 4,600 | 3,831 | 1,691 | 443 | 106 | 201 | 410 | 479 |
Non-cash operating lease cost | |||||||||
5,388 | - | - | - | - | - | - | - | - | - |
Gain on lease termination | |||||||||
1,995 | - | - | - | - | - | - | - | - | - |
Loss on the disposal of fixed assets | |||||||||
-2,682 | -1,331 | -1,000 | - | - | -20 | - | - | - | - |
Impairment of bonds | |||||||||
- | - | - | - | - | - | - | - | 0 | 0 |
Accretion of debt discount | |||||||||
21,189 | 14,031 | 12,904 | 6,242 | - | - | - | - | - | - |
Changes in operating assets: | |||||||||
Accounts receivable | |||||||||
12,350 | 9,193 | 7,375 | 9,126 | - | - | - | - | - | - |
Prepaid expenses and other current assets | |||||||||
5,353 | 3,682 | 7,535 | -4,284 | 7,516 | 3,371 | 1,714 | 387 | 630 | -53 |
Inventory | |||||||||
1,354 | 3,628 | 1,201 | 2,279 | - | - | - | - | - | - |
Security deposits | |||||||||
-2,562 | -7,153 | -1,438 | 13,796 | 1,575 | 1,388 | - | - | - | - |
Other assets | |||||||||
24,665 | - | - | - | - | - | - | - | - | - |
Changes in operating liabilities: | |||||||||
Accounts payable, accrued expenses and other current liabilities | |||||||||
56,411 | 10,332 | 29,226 | 19,960 | 32,218 | 6,200 | 3,514 | 2,241 | -83 | -123 |
Operating lease liabilities | |||||||||
-6,767 | - | - | - | - | - | - | - | - | - |
Interest payable | |||||||||
562 | - | 208 | 7,267 | - | - | - | - | 0 | 0 |
Deferred revenue | |||||||||
-2,432 | -2,022 | -5,693 | 2,129 | -1,782 | -741 | -1,622 | -2,446 | 14,608 | 0 |
Long-term other liabilities | |||||||||
12,717 | -1,807 | 5,578 | - | - | - | - | - | - | - |
Net cash (used in) operating activities | |||||||||
-236,613 | -240,714 | -265,402 | -342,441 | -162,902 | -87,738 | -28,006 | -15,749 | 2,605 | -13,657 |
Cash flows from investing activities: | |||||||||
Purchases of investment debt securities | |||||||||
603,014 | 436,071 | 231,107 | 511,521 | 640,709 | 204,344 | 125,825 | 65,940 | 0 | 0 |
Sales and maturities of investment debt securities | |||||||||
415,162 | 388,168 | 529,274 | 456,465 | 257,172 | 112,402 | 57,241 | 1,119 | 0 | 0 |
Redemptions of certificates of deposit | |||||||||
- | - | - | - | - | - | - | -3 | 3 | -86 |
Purchases of equipment, leasehold improvements, and furniture and fixtures | |||||||||
1,136 | 167 | 10,392 | 5,079 | 5,935 | 4,643 | 1,629 | 38 | 62 | 29 |
Net cash provided by investing activities | |||||||||
-188,988 | -48,070 | 287,775 | -60,135 | -389,472 | -96,585 | -70,214 | -64,857 | -66 | 57 |
Cash flows from financing activities: | |||||||||
Proceeds from issuance of common stock, net of issuance costs | |||||||||
227,300 | 261,362 | - | - | 558,756 | 183,475 | 61,169 | 108,499 | 0 | 19,690 |
Proceeds from issuance of common stock warrants | |||||||||
- | - | - | - | - | - | - | - | 0 | 5,198 |
Payments of capital lease obligation | |||||||||
- | - | - | - | - | - | - | 81 | 249 | 270 |
Proceeds from exercise of options, net | |||||||||
8,993 | 4,363 | 2,838 | 5,173 | 6,713 | 7,508 | 4,894 | - | 0 | 0 |
Payments for Capped Call Transactions and associated costs | |||||||||
- | - | - | 38,364 | - | - | - | - | - | - |
Proceeds from issuance of 2026 Convertible Notes, net of issuance costs | |||||||||
223,424 | - | - | 447,573 | - | - | - | - | - | - |
Payments of employee withholding taxes related to stock-based awards | |||||||||
2,158 | 2,180 | - | - | - | - | - | - | - | - |
Proceeds from exercise of warrants | |||||||||
- | - | - | - | - | - | 8 | - | 0 | 0 |
Proceeds from issuance of convertible promissory notes payable | |||||||||
- | - | - | - | - | - | - | - | 0 | 0 |
Net cash (used in) provided by financing activities | |||||||||
457,519 | 263,545 | 2,838 | 414,382 | 565,469 | 190,983 | 66,072 | 108,418 | -249 | 24,618 |
Effect of exchange rate changes on cash, cash equivalents and restricted cash | |||||||||
-386 | -1,526 | 1,127 | -873 | -376 | - | - | -7 | -6 | -29 |
Net (decrease) increase in cash, cash equivalents and restricted cash | |||||||||
31,532 | -26,765 | 26,338 | 10,933 | 12,719 | 6,660 | -32,148 | 27,804 | 2,283 | 10,989 |
Supplemental disclosures of noncash activities: | |||||||||
Conversion of promissory note payable, including accrued interest of $91,250 into common shares | |||||||||
- | - | - | - | - | - | - | - | 0 | 0 |
Issuance of 108,169 warrants for private placement agent fees | |||||||||
- | - | - | - | - | - | - | - | 0 | 0 |
Acquisition of equipment pursuant to capital leases | |||||||||
- | - | - | - | - | - | - | - | 0 | 0 |
Issuance of common stock for cashless warrant exchange | |||||||||
- | - | - | - | - | 220,944 | 8,696 | 1,018 | 0 | 0 |
Supplemental disclosure of cash flow information: | |||||||||
Cash paid during the year for interest | |||||||||
- | - | - | - | - | - | - | 4 | 13 | 25 |