| Dec'19 | Sep'19 | Jun'19 | Mar'19 | Dec'18 | Sep'18 | Jun'18 | Mar'18 |
|---|---|---|---|---|---|---|---|
Operating activities: | |||||||
Net loss | |||||||
-7,900 | -6,398 | -7,664 | -7,851 | -6,411 | -4,926 | -3,311 | -3,847 |
Adjustments to reconcile net loss to cash used in operating activities: | |||||||
Depreciation and amortization expense | |||||||
312 | 278 | 266 | 269 | 150 | 391 | 387 | 391 |
Change in fair value of preferred stock warrants and expirations | |||||||
0 | 0 | 0 | 0 | 0 | -1,520 | -1,517 | -953 |
Stock-based compensation | |||||||
356 | 364 | 335 | 289 | 1,033 | 53 | 52 | 54 |
Accretion of debt discount | |||||||
- | -75 | -79 | -49 | - | -61 | -39 | -21 |
Loss on debt extinguishment | |||||||
-412 | 0 | 0 | -921 | 0 | 0 | -342 | 0 |
Long-term debt prepayment fees | |||||||
- | 0 | 0 | 412 | - | - | - | 0 |
Changes in operating assets and liabilities: | |||||||
Accounts receivable | |||||||
888 | 1,017 | 926 | -457 | 513 | 614 | 588 | -816 |
Inventory | |||||||
1,754 | -67 | 1,616 | 337 | -1,682 | 1,928 | -147 | 320 |
Prepaid expenses and other current assets | |||||||
343 | 189 | -1,088 | 801 | -428 | -421 | 23 | 673 |
Accounts payable | |||||||
320 | -1,215 | 2,767 | -510 | -1,015 | 1,119 | 297 | -1,355 |
Accrued expenses and contract liabilities | |||||||
-411 | 704 | -918 | 550 | -353 | 57 | 970 | -920 |
Net Cash Provided by (Used in) Operating Activities | |||||||
-9,454 | -7,176 | -6,317 | -6,551 | -4,090 | -6,099 | -2,966 | -6,787 |
Investing activities: | |||||||
Purchases of property and equipment | |||||||
22 | 8 | 29 | 0 | 11 | 130 | 177 | 11 |
Net cash used in investing activities | |||||||
-22 | -8 | -29 | 0 | -11 | -130 | -177 | -11 |
Financing activities: | |||||||
Proceeds from issuance of long-term debt, net of issuance costs | |||||||
- | -37 | 0 | 19,207 | - | -129 | 9,662 | 0 |
Proceeds from borrowing from line of credit | |||||||
5,113 | 0 | 0 | 0 | -14,329 | 0 | 1,000 | 13,329 |
Repayment of long-term debt | |||||||
0 | 0 | 0 | 10,812 | 0 | 0 | 7,447 | 0 |
Proceeds from issuance of common stock, net of issuance costs | |||||||
- | - | - | 2,409 | - | - | - | 0 |
Proceeds from option exercises | |||||||
- | 0 | 11 | 53 | - | 2 | 0 | 0 |
Net cash provided by financing activities | |||||||
18,593 | 115 | 810 | 10,858 | -32 | 19,262 | 3,215 | 13,330 |
Net increase in cash and cash equivalents | |||||||
9,086 | -7,069 | -5,535 | 4,307 | -4,134 | 13,032 | 71 | 6,530 |
Supplemental disclosure of non-cash financing and investing activity: | |||||||
Fair value of warrants issued with debt classified as a liability | |||||||
- | 0 | 0 | 629 | - | 0 | 176 | 0 |
Transfer of instruments and servers from inventory into property and equipment | |||||||
906 | 359 | -29 | 29 | 0 | -106 | 106 | 0 |
Final payment fee due in connection with the repayment of debt classified within other long-term liabilities | |||||||
0 | 0 | -201 | 201 | 0 | 0 | 400 | 0 |
Loan amendment fee due in connection with the repayment of debt classified within current liabilities | |||||||
- | - | - | 0 | - | - | - | 70 |