| Dec'17 | Dec'15 | Dec'14 | Dec'13 | |||
|---|---|---|---|---|---|---|
Cash flows from operating activities | ||||||
Net loss | ||||||
-39,918 | -37,570 | -20,662 | -12,109 | |||
Adjustments to reconcile net loss to net cash used in operating activities: | ||||||
Depreciation and amortization | ||||||
1,992 | 1,710 | 344 | 227 | |||
Stock-based compensation | ||||||
3,343 | 1,249 | 663 | 279 | |||
Changes in fair value of convertible preferred stock warrant liability | ||||||
- | 472 | -522 | -168 | |||
Recovery of doubtful receivable accounts | ||||||
-23 | 216 | 87 | -1 | |||
Loss on extinguishment of debt | ||||||
-352 | - | - | - | |||
Payment of original issue discount | ||||||
210 | - | - | - | |||
Non-cash interest expense | ||||||
122 | 143 | 90 | 68 | |||
Accretion of premium (discount) on marketable securities | ||||||
17 | - | 243 | -191 | |||
Changes in operating assets and liabilities: | ||||||
Accounts receivable | ||||||
1,581 | 1,033 | 1,384 | 677 | |||
Inventory | ||||||
2,384 | 911 | 786 | 2,384 | |||
Prepaid expenses and other current assets | ||||||
186 | -1,568 | 1,923 | 177 | |||
Other non-current assets | ||||||
285 | - | -55 | - | |||
Accounts payable | ||||||
1,372 | 1,349 | 143 | 413 | |||
Accrued and other current liabilities | ||||||
-1,310 | 1,537 | 1,034 | 441 | |||
Deferred rent | ||||||
-152 | 105 | 2,910 | - | |||
Net cash used in operating activities | ||||||
-38,885 | -31,165 | - | - | |||
Cash flows from investing activities | ||||||
Net cash used in operating activities | ||||||
- | - | -19,818 | -13,897 | |||
Purchases of property and equipment | ||||||
844 | 3,748 | 6,791 | 468 | |||
Purchases of marketable securities | ||||||
12,503 | - | 17,510 | 2,156 | |||
Sales of marketable securities | ||||||
- | - | 17,270 | - | |||
Maturities of marketable securities | ||||||
20,217 | - | 850 | 18,120 | |||
Net cash (used in) provided by investing activities | ||||||
6,870 | -3,748 | - | - | |||
Cash flows from financing activities | ||||||
Proceeds from revolving credit facility, net of payment | ||||||
5,859 | - | - | - | |||
Proceeds from issuance of common stock upon initial public offering, net of issuance costs | ||||||
- | 47,219 | - | - | |||
Proceeds from common stock offerings, net of offering costs | ||||||
203 | - | - | - | |||
Change in restricted cash | ||||||
- | - | 1,090 | - | |||
Net cash provided by (used in) investing activities | ||||||
- | - | -7,271 | 15,496 | |||
Proceeds from issuance of long-term debt, net of issuance costs | ||||||
- | - | - | 2,500 | |||
Proceeds from issuance of long-term debt, net of issuance costs | ||||||
29,672 | - | 9,800 | - | |||
Proceeds from issuance of long-term debt-related party, net of issuance costs | ||||||
- | 5,000 | - | - | |||
Payments of long-term debt - related party | ||||||
14,765 | - | - | - | |||
Proceeds from issuance of common stock upon exercise of stock options | ||||||
526 | 139 | 78 | 65 | |||
Repayments of long-term debt | ||||||
- | - | 2,500 | 3,016 | |||
Payments to repurchase early exercised common stock | ||||||
- | 1 | - | - | |||
Proceeds from issuance of convertible preferred stock, net of issuance costs | ||||||
- | 22,769 | 20,806 | - | |||
Net cash provided by financing activities | ||||||
21,495 | 75,126 | - | - | |||
Net cash provided by financing activities | ||||||
- | - | 28,184 | -451 | |||
Net increase (decrease) in cash and cash equivalents | ||||||
-10,520 | 40,213 | 1,095 | 1,148 | |||
Supplemental disclosures of cash flow information | ||||||
Interest paid | ||||||
- | - | 275 | 165 | |||
Interest paid to related party | ||||||
377 | 1,740 | 1,052 | - | |||
Cash paid for interest | ||||||
1,536 | - | - | - | |||
Non-cash investing and financing activities | ||||||
Purchases of property and equipment in accounts payable and accrued liabilities at period end | ||||||
59 | 78 | 1,462 | 31 | |||
At-the-market offering in accounts payable and accrued liabilities | ||||||
20 | - | - | - | |||
Reclassification of convertible preferred stock warrant liability to additional paid-in capital upon conversion of preferred stock warrants into common stock warrants | ||||||
- | 608 | - | - | |||
Common stock offering costs in accounts payable and accrued liabilities | ||||||
- | - | 30 | - | |||
Conversion of convertible preferred stock into common stock and additional paid in capital | ||||||
- | 96,524 | - | - | |||