| Mar'20 | Dec'19 | Sep'19 | Jun'19 | Mar'19 | Dec'18 | Sep'18 | Jun'18 | Mar'18 | Dec'17 | Sep'17 | Jun'17 | Mar'17 | Dec'16 | Sep'16 | Jun'16 | Mar'16 | Dec'15 | Sep'15 | Jun'15 | Mar'15 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Cash flows from operating activities: | ||||||||||||||||||||
Net loss | ||||||||||||||||||||
-65,096 | -53,845 | -52,519 | -49,944 | -50,857 | -55,545 | -55,529 | -53,982 | -51,286 | -45,470 | -42,240 | -42,150 | -43,965 | -49,000 | -60,332 | -61,963 | -57,755 | -49,857 | 0 | 0 | 0 |
Adjustments to reconcile net loss to net cash used in operating activities: | ||||||||||||||||||||
Depreciation and amortization | ||||||||||||||||||||
17,944 | 16,528 | 15,329 | 13,391 | 12,125 | 11,097 | 10,061 | 9,468 | 8,403 | 7,628 | 6,699 | 6,543 | 6,638 | 6,725 | 6,982 | 6,410 | 5,929 | 5,352 | 0 | 0 | 0 |
Amortization of debt discount and issuance costs | ||||||||||||||||||||
10,746 | 10,513 | 10,318 | 8,935 | 6,341 | 3,831 | 0 | 0 | 0 | - | - | - | - | - | - | - | - | 1,129 | 0 | 0 | 0 |
Stock-based compensation expense | ||||||||||||||||||||
45,377 | 40,664 | 36,084 | 33,082 | 30,002 | 27,593 | 25,802 | 23,666 | 21,487 | 19,541 | 18,717 | 17,606 | 16,076 | 17,316 | 21,189 | 18,439 | 15,629 | 10,685 | 0 | 0 | 0 |
Provision for doubtful accounts | ||||||||||||||||||||
2,331 | 2,241 | 2,042 | 1,637 | 1,021 | 740 | 876 | 883 | 745 | 905 | 936 | 1,015 | 1,123 | 931 | 756 | 846 | 787 | 828 | 0 | 0 | 0 |
Foreign currency re-measurement loss | ||||||||||||||||||||
-453 | -255 | -761 | -477 | -859 | -757 | -612 | -345 | 261 | 364 | 186 | 61 | -325 | -58 | 103 | 19 | 311 | -153 | 0 | 0 | 0 |
Other non-cash (income) expense | ||||||||||||||||||||
1,305 | 1,889 | 1,796 | 1,725 | 1,176 | 506 | 350 | 37 | -60 | -209 | -604 | -527 | -397 | -222 | 0 | 0 | 0 | - | - | - | - |
Changes in operating assets and liabilities: | ||||||||||||||||||||
Accounts receivable | ||||||||||||||||||||
6,921 | 14,800 | 10,112 | 21,722 | 21,678 | 1,685 | 6,060 | 1,871 | 5,677 | 25,217 | 11,199 | 9,900 | 5,061 | 6,195 | 6,587 | 12,585 | 8,501 | 18,370 | 0 | 0 | 0 |
Deferred contract acquisition and fulfillment costs | ||||||||||||||||||||
10,728 | 11,306 | 11,808 | 11,431 | 12,171 | 12,790 | 6,385 | 4,531 | 1,713 | 0 | 0 | 0 | 0 | - | - | - | - | - | - | - | - |
Prepaid expenses and other assets | ||||||||||||||||||||
7,616 | 13,691 | 7,731 | 6,019 | 3,037 | 287 | 3,109 | 4,088 | 4,730 | 74 | 1,846 | 1,710 | 1,341 | 3,523 | 2,342 | 2,121 | 1,725 | 1,787 | 0 | 0 | 0 |
Accounts payable | ||||||||||||||||||||
4,036 | 92 | 4,242 | 3,468 | 522 | 3,675 | -1,370 | 1,791 | 1,206 | -2,257 | 748 | -1,942 | 1,875 | 1,619 | -152 | 970 | -2,114 | -2,302 | 0 | 0 | 0 |
Accrued expenses | ||||||||||||||||||||
3,886 | 4,759 | 3,370 | 6,512 | 3,645 | 6,018 | 3,781 | 1,074 | 2,657 | 6,758 | 3,988 | 2,918 | 1,789 | 1,578 | 3,504 | 4,322 | 3,203 | 6,702 | 0 | 0 | 0 |
Deferred revenue | ||||||||||||||||||||
14,119 | 18,686 | 13,059 | 18,805 | 17,261 | 22,870 | 33,544 | 43,070 | 50,358 | 55,437 | 39,380 | 35,709 | 35,792 | 38,748 | 38,748 | 46,848 | 42,820 | 44,868 | 0 | 0 | 0 |
Other liabilities | ||||||||||||||||||||
-1,650 | 1,018 | 2,281 | 2,165 | 2,416 | 367 | -607 | -800 | -1,128 | -950 | -573 | -189 | 458 | 558 | 105 | -273 | -329 | -119 | 0 | 0 | 0 |
Net cash used in operating activities | ||||||||||||||||||||
4,931 | -1,420 | 2,690 | -3,199 | -14,796 | 6,066 | 2,334 | 12,128 | 17,261 | 13,286 | 12,135 | 8,181 | 14,025 | 9,112 | 2,134 | 2,617 | -487 | -1,907 | 0 | 0 | 0 |
Cash flows from investing activities: | ||||||||||||||||||||
Purchases of property and equipment | ||||||||||||||||||||
23,721 | 29,428 | 31,462 | 24,875 | 19,129 | 12,813 | 9,722 | 7,896 | 5,636 | 4,824 | 4,698 | 5,235 | 4,742 | 4,499 | 4,604 | 4,783 | 4,655 | 4,136 | 0 | 0 | 0 |
Capitalization of internal-use software costs | ||||||||||||||||||||
5,960 | 6,087 | 5,446 | 5,004 | 4,173 | 3,265 | 2,911 | 2,259 | 1,855 | 1,162 | 0 | 0 | 0 | - | - | - | - | - | - | - | - |
Purchases of investments | ||||||||||||||||||||
109,290 | 148,047 | 168,684 | 295,198 | 291,990 | 233,421 | 192,451 | 30,017 | 32,249 | 35,190 | 60,660 | 54,804 | 46,377 | 38,976 | 0 | 0 | 0 | - | - | - | - |
Sales/maturities of investments | ||||||||||||||||||||
256,166 | 214,980 | 207,937 | 177,400 | 128,902 | 70,226 | 48,726 | 52,195 | 46,834 | 33,672 | 24,522 | 14,605 | 900 | 0 | 0 | 0 | 0 | - | - | - | - |
Net cash provided by (used in) investing activities | ||||||||||||||||||||
102,588 | 16,811 | -26,722 | -176,758 | -200,850 | -193,733 | -156,358 | -2,694 | -7,623 | -22,221 | -56,309 | -45,750 | -50,219 | -43,475 | -40,071 | -40,250 | -43,466 | -42,947 | 0 | 0 | 0 |
Cash flows from financing activities: | ||||||||||||||||||||
Proceeds from follow-on public offering, net of offering costs of $608 | ||||||||||||||||||||
- | - | - | - | - | 30,907 | 30,907 | 30,907 | 31,231 | 0 | 0 | 0 | 0 | - | - | - | - | - | - | - | - |
Payments of capital lease obligations | ||||||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | - | - | 68 | 134 | 198 | 262 | 253 | 0 | 0 | 0 |
Taxes paid related to net share settlement of equity awards | ||||||||||||||||||||
7,506 | 6,952 | 5,411 | 4,031 | 2,714 | 2,197 | 1,942 | 1,442 | 991 | 698 | 756 | 615 | 1,196 | 4,114 | 0 | 0 | 0 | - | - | - | - |
Proceeds from employee stock purchase plan | ||||||||||||||||||||
6,233 | 5,521 | 5,521 | 4,639 | 4,639 | 3,637 | 3,637 | 3,047 | 3,047 | 2,914 | 2,914 | 3,127 | 3,127 | 3,724 | 0 | 0 | 0 | - | - | - | - |
Proceeds from stock option exercises | ||||||||||||||||||||
9,062 | 10,219 | 9,009 | 9,007 | 8,363 | 7,606 | 7,374 | 6,394 | 7,034 | 5,848 | 5,401 | 5,604 | 3,152 | 2,924 | 2,547 | 2,030 | 1,443 | 1,304 | 0 | 0 | 0 |
Net cash provided by financing activities | ||||||||||||||||||||
7,789 | 8,788 | 8,711 | 205,826 | 206,175 | 236,164 | 236,595 | 38,906 | 39,525 | 7,268 | 5,458 | 6,015 | 3,778 | 1,161 | 1,670 | 95,429 | 93,925 | 94,786 | 0 | 0 | 0 |
Effect of exchange rate changes on cash, cash equivalents and restricted cash | ||||||||||||||||||||
-743 | -331 | -914 | -531 | -806 | -694 | -466 | -177 | 321 | 281 | 56 | -133 | -430 | -203 | -2 | -41 | 193 | -202 | 0 | 0 | 0 |
Net increase (decrease) in cash, cash equivalents and restricted cash | ||||||||||||||||||||
114,565 | 23,848 | -16,235 | 25,338 | -10,277 | 47,803 | 82,105 | 48,163 | 49,484 | -1,386 | -38,660 | -31,687 | -32,846 | -33,405 | -36,269 | 57,755 | 50,165 | 49,730 | 0 | 0 | 0 |
Supplemental cash flow information: | ||||||||||||||||||||
Cash paid for interest on convertible senior notes | ||||||||||||||||||||
2,875 | 2,779 | 2,779 | 1,342 | 1,342 | 0 | 0 | 0 | 0 | - | - | - | - | 5 | 4 | 321 | 879 | 1,427 | 0 | 0 | 0 |
Cash paid for income taxes, net of refunds | ||||||||||||||||||||
345 | 400 | 369 | 192 | 223 | 188 | 265 | 493 | 789 | 801 | 835 | 845 | 347 | 556 | 530 | 584 | 557 | 341 | 0 | 0 | 0 |
Non-cash investing activities: | ||||||||||||||||||||
Leasehold improvements acquired through tenant improvement allowance | ||||||||||||||||||||
6,703 | 14,016 | 14,016 | 14,016 | 7,313 | 0 | 0 | 0 | 0 | - | - | - | - | - | - | - | - | - | - | - | - |
Reconciliation of cash, cash equivalents and restricted cash: | ||||||||||||||||||||