| Dec'19 | Dec'18 | Dec'17 | Dec'16 | Dec'15 | Dec'14 | |
|---|---|---|---|---|---|---|
Cash flows from operating activities: | ||||||
Net loss | ||||||
-13,044 | -15,705 | -9,833 | -6,074 | -3,878 | -1,819 | |
Adjustments to reconcile net loss to net cash used in operating activities: | ||||||
Depreciation and amortization | ||||||
147 | 79 | 57 | 57 | 30 | 2 | |
Loss on disposal of property and equipment | ||||||
- | -1 | - | - | - | - | |
Stock-based compensation | ||||||
2,609 | 4,318 | 1,633 | 735 | 396 | 305 | |
Amortization of debt discount | ||||||
420 | 311 | 0 | 0 | 0 | 0 | |
Amortization of debt issuance costs | ||||||
19 | 14 | - | - | - | - | |
Discount on investments | ||||||
34 | -29 | - | - | - | - | |
Changes in operating assets and liabilities: | ||||||
Restricted cash | ||||||
- | - | - | - | -4 | -122 | |
Prepaid expenses and other current assets | ||||||
100 | 96 | 53 | 22 | 68 | 4 | |
Accounts payable | ||||||
-697 | 650 | 388 | -106 | -80 | 235 | |
Accrued liabilities | ||||||
564 | 102 | 116 | -22 | - | - | |
Accrued liabilities | ||||||
- | - | - | - | -149 | 235 | |
Accrued payroll and other compensation | ||||||
10 | 164 | 55 | 230 | 113 | 84 | |
Net cash used in operating activities | ||||||
-10,106 | -10,130 | -7,634 | - | - | -838 | |
Net cash used in operating activities | ||||||
- | - | - | -5,202 | -3,631 | - | |
Cash flows from investing activities: | ||||||
Purchases of property and equipment | ||||||
149 | 423 | 3 | 88 | 225 | 2 | |
Patent costs | ||||||
- | 1 | - | - | - | - | |
Patent costs | ||||||
- | - | 23 | - | - | - | |
Capitalized patent costs | ||||||
- | - | - | 0 | - | - | |
Payment for security deposit | ||||||
7 | 9 | 10 | 16 | 19 | 0 | |
Purchases of investments | ||||||
40,348 | 41,402 | 21,414 | 14,093 | 12,731 | 0 | |
Proceeds from redemptions of investments | ||||||
-56,843 | -30,541 | -21,214 | -14,152 | -7,244 | 0 | |
Proceeds from exercise of warrants | ||||||
- | - | - | - | 0 | - | |
Net cash (used in) provided by investing activities | ||||||
16,338 | -11,292 | -236 | - | - | -2 | |
Net cash (used in) provided by investing activities | ||||||
- | - | - | -46 | -5,732 | - | |
Cash flows from financing activities: | ||||||
Proceeds from notes payable | ||||||
- | 3,902 | - | - | - | - | |
Deferred offering costs | ||||||
- | - | - | - | 35 | 749 | |
Proceeds from the issuance of preferred stock, net | ||||||
- | - | - | - | - | 2,430 | |
Proceeds from convertible notes | ||||||
- | - | - | - | - | 210 | |
Debt issuance costs | ||||||
- | 57 | - | - | - | - | |
Proceeds from the Controlled Equity Offering, net | ||||||
- | 19,304 | - | 0 | 10,253 | 0 | |
Proceeds from exercise of warrants | ||||||
57 | 678 | 2,487 | 2,969 | - | - | |
Repayment of note payable | ||||||
- | - | 205 | 0 | - | - | |
Proceeds from private offering, net | ||||||
- | - | 5,026 | - | 2,700 | 0 | |
Proceeds from exercise of compensation options | ||||||
- | - | - | 731 | 55 | - | |
Proceeds from exercise of employee stock options | ||||||
552 | 494 | 129 | 2 | 0 | - | |
Net cash provided by financing activities | ||||||
609 | 24,321 | 7,437 | - | - | 1,890 | |
Net cash provided by financing activities | ||||||
- | - | - | 3,703 | 12,973 | - | |
Net decrease in cash and cash equivalents | ||||||
6,841 | 2,898 | -434 | -1,546 | 3,609 | 1,049 | |
Non-cash investing and financing activities: | ||||||
Warrants issued in connection with note payable | ||||||
- | 1,253 | - | - | - | - | |
Warrants issued in connection with bridge loans | ||||||
- | - | - | - | - | 0 | |
Conversion of convertible notes to Series B Preferred Stock | ||||||
- | - | - | - | - | 210 | |
Reclassification of deferred offering costs to equity | ||||||
- | - | - | - | 785 | 0 | |
Conversion of Series B Preferred Stock to Common Stock | ||||||
- | - | - | - | 5 | 0 | |
Subscription receivable from exercise of warrants | ||||||
- | - | - | 522 | - | - | |
Supplemental disclosure of cash flow information: | ||||||
Cash paid for income taxes | ||||||
1 | 1 | 2 | 1 | - | 1 | |
Interest | ||||||
- | - | 29 | - | - | - | |
Cash paid for interest | ||||||
- | - | - | 0 | 0 | 0 | |