| Dec'19 | Dec'18 | Dec'17 | Dec'16 | Dec'15 | ||
|---|---|---|---|---|---|---|
Cash flows from operating activities: | ||||||
Net loss | ||||||
-94,347 | -66,738 | -42,211 | -33,167 | -16,682 | ||
Adjustments to reconcile net loss to cash used in operating activities: | ||||||
Depreciation | ||||||
843 | 352 | 287 | 297 | 330 | ||
Non-cash operating lease cost | ||||||
1,773 | 603 | - | - | - | ||
Amortization of right-of-use assets | ||||||
- | - | 356 | - | - | ||
Change in fair value of warrant liability | ||||||
- | - | 1,844 | -122 | 132 | ||
Loss of extinguishment of debt | ||||||
- | -390 | - | - | - | ||
Amortization of debt discount and other non-cash interest | ||||||
958 | 274 | 111 | - | - | ||
Amortization of debt discount and other non-cash interest | ||||||
- | - | - | 106 | 134 | ||
Write-off of deferred offering costs | ||||||
- | - | - | 1,789 | - | ||
Stock-based compensation | ||||||
9,991 | 8,615 | 3,571 | 2,069 | 638 | ||
Loss on disposal of fixed asset | ||||||
- | - | - | - | -19 | ||
Change in operating assets and liabilities: | ||||||
Accounts receivable | ||||||
11,563 | - | - | - | -36 | ||
Prepaid expenses and other current assets | ||||||
1,789 | 1,387 | 494 | 66 | -34 | ||
Inventory | ||||||
4,271 | 3,868 | - | - | - | ||
Accounts payable | ||||||
-2,770 | 4,088 | 205 | -343 | 911 | ||
Accrued expenses and other current liabilities | ||||||
9,630 | 3,968 | 2,601 | 2,108 | -605 | ||
Lease liabilities and other long-term liabilities | ||||||
-1,175 | -418 | -368 | - | - | ||
Lease liabilities and other long-term liabilities | ||||||
- | - | -361 | - | - | ||
Other long-term liabilities | ||||||
- | - | - | -19 | -36 | ||
Net cash used in operating activities | ||||||
-92,720 | -54,121 | -34,098 | -27,348 | -15,089 | ||
Cash flows from investing activities: | ||||||
Purchases of property and equipment | ||||||
1,335 | 1,578 | 480 | 153 | 252 | ||
Net cash used in investing activities | ||||||
-1,335 | -1,578 | -480 | -153 | -252 | ||
Cash flows from financing activities: | ||||||
Payment of venture debt issuance costs | ||||||
- | - | - | 23 | 3 | ||
Payment of deferred offering costs | ||||||
- | - | - | 283 | 1,506 | ||
Proceeds from venture debt, net of debt issuance costs of $0 and $50 | ||||||
- | 2,728 | - | - | - | ||
Proceeds from venture debt, net of debt issuance costs of $50 | ||||||
- | - | 10,000 | - | - | ||
Proceeds from issuance of debt and warrants, net of debt issuance costs of $0 and $3,073 | ||||||
- | 71,927 | - | 1,333 | 5,000 | ||
Payment of principal and prepayment penalty on venture debt | ||||||
- | 21,847 | 1,111 | 1,333 | - | ||
Payment of principal on finance lease | ||||||
30 | - | - | - | - | ||
Proceeds from common stock offerings, net of underwriters' discounts and offering cost | ||||||
8,425 | 70,766 | 94,005 | - | - | ||
Proceeds from exercise of warrants | ||||||
- | - | 379 | - | - | ||
Proceeds from exercise of stock options and issuance of common stock under employee stock purchase plan | ||||||
587 | 530 | 423 | 0 | 104 | ||
Net cash provided by financing activities | ||||||
8,982 | 124,104 | 103,696 | 67,214 | 10,480 | ||
Net increase/(decrease) in cash and restricted cash: | ||||||
-85,073 | 68,405 | 69,118 | 39,713 | -4,861 | ||
Reconciliation of cash and restricted cash: | ||||||
Less restricted cash | ||||||
- | - | 134 | 109 | 109 | ||
Non-cash investing and financing activities: | ||||||
Right-of-use asset obtained in exchange for finance lease obligation | ||||||
136 | - | - | - | - | ||
Purchases of property and equipment in accrued expenses | ||||||
195 | - | - | - | - | ||
Purchases of property and equipment in accounts payable | ||||||
- | 155 | - | - | - | ||
Cashless exercise of warrants | ||||||
- | - | 411 | - | - | ||
Deferred offering costs included in accounts payable and accruals | ||||||
- | - | - | - | 226 | ||
Supplemental disclosure: | ||||||
Fair value of warrants issued in connection with venture debt | ||||||
- | - | - | 225 | - | ||
Cash paid for interest | ||||||
7,522 | 3,041 | 863 | 681 | 442 | ||
Conversion of convertible preferred stock into common stock | ||||||
- | - | 118,391 | - | - | ||
Right-of-use assets obtained in exchange of operating lease obligations | ||||||
1,852 | 29,427 | - | - | - | ||