| Dec'19 | Dec'18 | Dec'17 | Dec'16 | Dec'15 | Dec'14 | Dec'13 |
|---|---|---|---|---|---|---|
Cash flows from operating activities | ||||||
Net loss | ||||||
-19,450 | -27,558 | -48,732 | -56,128 | -47,344 | -31,964 | - |
Net loss | ||||||
- | - | - | - | - | - | -39,901 |
Adjustments to reconcile net loss to net cash used in operating activities: | ||||||
Depreciation and amortization | ||||||
890 | 1,281 | 1,476 | 1,506 | 1,300 | 1,451 | 1,501 |
Amortization of debt issuance costs and debt discount | ||||||
171 | 117 | 218 | 222 | 199 | 212 | 133 |
Stock-based compensation | ||||||
2,091 | 3,080 | 4,966 | 7,392 | 5,899 | 641 | 654 |
Noncash interest expense and other charges | ||||||
1,575 | 5,634 | 3,252 | - | - | - | - |
Remeasurement of embedded derivatives | ||||||
- | - | - | - | 835 | 378 | - |
Write off of embedded derivatives | ||||||
- | - | - | - | 1,066 | - | - |
Remeasurement of warrant liability and embedded derivatives | ||||||
- | - | - | - | - | - | 1 |
Noncash interest expense and other charges | ||||||
1,575 | 5,634 | 3,252 | 1,812 | 2,074 | 3,485 | 1,221 |
Common stock issued for services | ||||||
- | 106 | - | - | - | - | - |
Provision for litigation settlement | ||||||
- | - | 1,760 | - | - | - | - |
Loss on extinguishment of convertible notes | ||||||
- | - | - | - | -86 | -1,234 | - |
Provision for doubtful accounts receivable | ||||||
- | - | 125 | 3 | - | - | 45 |
Gain on sale of property and equipment | ||||||
- | - | -18 | - | - | - | - |
Provision for excess and obsolete inventories | ||||||
272 | 914 | 5,500 | 797 | -26 | -48 | 15 |
Other non-cash charges | ||||||
51 | -126 | - | - | - | - | - |
Changes in operating assets and liabilities: | ||||||
Accounts receivable | ||||||
248 | 160 | -2,318 | 1,512 | -7 | 441 | 443 |
Inventories | ||||||
1,169 | 92 | 1,181 | 6,099 | 2,307 | -1,714 | 3,069 |
Prepaid expenses and other current assets | ||||||
-128 | -5 | -22 | 130 | 363 | -444 | 230 |
Other assets | ||||||
-658 | -340 | 475 | -13 | 35 | -2 | -139 |
Accounts payable | ||||||
-485 | -125 | -334 | 470 | 84 | 17 | -275 |
Accrued compensation | ||||||
585 | 334 | -1,945 | -275 | 1,936 | -128 | 281 |
Leasehold liability | ||||||
-1,402 | - | - | - | - | - | - |
Accrued expenses and other current liabilities | ||||||
-795 | -2,208 | -1,205 | -191 | -962 | 2,080 | -523 |
Other long-term liabilities | ||||||
-34 | -260 | - | - | - | - | - |
Other long-term liabilities and accrued interest | ||||||
- | - | -259 | -949 | -1,662 | -122 | -204 |
Net cash used in operating activities | ||||||
-17,264 | -18,466 | -34,476 | -53,069 | -40,883 | -21,801 | - |
Cash flows from investing activities | ||||||
Net cash used in operating activities | ||||||
- | - | - | - | - | - | -40,655 |
Purchase of property and equipment | ||||||
88 | 32 | 45 | 971 | 577 | 117 | 496 |
Proceeds from sale of property and equipment | ||||||
18 | 28 | 4 | - | - | - | - |
Net cash used in investing activities | ||||||
-70 | -4 | -41 | -971 | -322 | -117 | - |
Cash flows from financing activities | ||||||
Restricted cash | ||||||
- | - | - | - | -255 | - | - |
Net cash used in investing activities | ||||||
- | - | - | - | - | - | -496 |
Principal paydown of capital lease obligations | ||||||
- | - | 25 | 27 | 22 | 17 | 18 |
Proceeds from public offerings, net of issuance costs | ||||||
- | 3,026 | 3,589 | - | - | - | - |
Proceeds from the issuance of common stock related to warrant exercises | ||||||
7,993 | 581 | - | - | 323 | - | - |
Proceeds from the issuance of common stock under officers and directors purchase plan | ||||||
63 | 21 | - | - | - | - | - |
Proceeds from the issuance of convertible preferred stock, net of issuance costs | ||||||
- | 15,525 | - | - | - | - | - |
Proceeds from the issuance of common stock in public offerings, net | ||||||
- | 10,179 | - | - | - | - | - |
Payments for deferred initial public offering costs | ||||||
- | - | - | - | - | 1,848 | - |
Proceeds from the issuance of common stock | ||||||
- | - | - | 805 | 432 | 23 | - |
Debt discount in connection with loan amendment | ||||||
- | 155 | - | - | - | - | - |
Payments on borrowing | ||||||
- | - | - | - | 27,625 | - | - |
Proceeds from convertible notes, net of issuance costs | ||||||
- | - | - | - | - | 4,700 | 13,399 |
Proceeds from borrowings, net of issuance costs | ||||||
- | - | - | 9,716 | 29,124 | - | 19,281 |
Proceeds from the issuance of convertible preferred stock, net of issuance costs | ||||||
- | - | - | - | 6,176 | 19,155 | -5 |
Proceeds from the issuance of common stock related to CRG loan, net of issuance costs | ||||||
- | - | - | - | 4,794 | - | - |
Proceeds from the issuance of common stock | ||||||
3,811 | 314 | 246 | 36,583 | 58,746 | - | 98 |
Net cash provided by financing activities | ||||||
11,867 | 29,491 | 3,810 | 47,077 | 71,948 | 22,013 | - |
Net cash provided by financing activities | ||||||
- | - | - | - | - | - | 32,755 |
Net change in cash and cash equivalents | ||||||
-5,467 | 11,021 | -30,707 | -6,963 | 30,743 | 95 | -8,396 |
Supplemental disclosure of cash flow information | ||||||
Cash paid for interest | ||||||
- | 60 | 3,942 | 4,354 | 5,934 | 2,281 | 1,587 |
Noncash investing and financing activities: | ||||||
Conversion of convertible preferred stock to common stock upon initial public offering | ||||||
- | - | - | - | 137,632 | - | - |
Accounts payable for purchases of property and equipment | ||||||
- | - | - | 24 | 16 | - | 20 |
Disposal of fully depreciated property and equipment | ||||||
54 | 2,849 | 1,738 | - | - | - | - |
Accretion of Series A preferred stock dividends | ||||||
3,580 | 2,918 | - | - | - | - | - |
Conversion of CRG loan principal and accrued interest into Series A Convertible preferred stock | ||||||
- | 42,794 | - | - | - | 11,582 | - |
Issuance of Series A preferred stock to pay dividends | ||||||
6,498 | - | - | - | - | - | - |
Increase to right of use asset and leasehold liability arising from lease amendment | ||||||
4,680 | - | - | - | - | - | - |
Capital lease obligations for property and equipment | ||||||
- | - | - | - | - | - | 23 |
Modification of convertible preferred stock | ||||||
- | - | - | - | 2,384 | - | - |
Reclass of warrants liability to additional paid-in capital | ||||||
- | - | - | - | - | 34 | - |
Vesting of common stock subject to repurchase | ||||||
- | - | - | - | 18 | 5 | 10 |
Embedded derivatives associated with convertible notes | ||||||
- | - | - | - | - | - | -179 |
Issuance of common stock warrants | ||||||
- | - | - | - | 804 | 175 | 1 |
Transfers between inventory and property and equipment | ||||||
408 | 51 | 153 | 2,245 | 921 | -916 | 1,829 |
Reclassification of right of use asset to prepaid rent | ||||||
462 | - | - | - | - | - | - |