| Dec'19 | Dec'18 | Dec'17 | Dec'16 | Dec'15 | Dec'14 | Dec'13 |
|---|---|---|---|---|---|---|
Cash flows from operating activities: | ||||||
Net loss | ||||||
-38,399 | -50,840 | -49,376 | - | - | - | - |
Net loss | ||||||
- | - | - | -45,817 | -27,561 | -45,603 | -5,521 |
Adjustments to reconcile net loss to Net cash used in operating activities: | ||||||
Depreciation and amortization | ||||||
781 | 1,054 | 1,309 | 957 | 817 | 371 | 4 |
Stock based compensation | ||||||
10,646 | 16,753 | 15,802 | 9,508 | 5,951 | 2,547 | 16 |
Changes in operating lease right-of-use assets | ||||||
786 | - | - | - | - | - | - |
Bad debt expense | ||||||
35 | - | - | - | - | - | - |
Loss on disposal of property and equipment | ||||||
-7 | - | -0 | - | - | - | - |
Amortization of debt discount | ||||||
- | - | - | - | - | 964 | 705 |
Warrant expense | ||||||
- | - | - | - | - | - | 724 |
Write-off of abandoned trademark | ||||||
- | - | - | - | - | - | 4 |
Gain on conversion of notes payable and accrued interest | ||||||
- | - | - | - | - | 2,084 | 0 |
Change in fair market value of derivative liabilities | ||||||
- | - | - | - | - | -26,265 | -177 |
Loss on retirement of fixed assets | ||||||
- | - | - | - | - | -22 | 0 |
Amortization of prepaid rent from stock issuance to landlord | ||||||
- | 80 | 80 | 80 | 80 | 20 | 0 |
Changes in operating assets and liabilities: | ||||||
Accounts receivable | ||||||
53 | 44 | -149 | 149 | - | 0 | - |
Prepaid expenses and other current assets | ||||||
-130 | -445 | -348 | 652 | 157 | 289 | 127 |
Other assets | ||||||
- | -30 | -15 | -2 | 28 | 15 | 6 |
Accounts payable | ||||||
-189 | -163 | -2,683 | 2,382 | 608 | 1,354 | 359 |
Accrued expenses | ||||||
284 | 156 | 53 | 492 | 283 | 838 | 233 |
Operating lease liabilities | ||||||
-662 | - | - | - | - | - | - |
Deferred revenue | ||||||
12 | - | -131 | - | - | - | - |
Deferred revenue | ||||||
- | - | - | 131 | - | 0 | - |
Net cash used in operating activities | ||||||
-26,621 | -32,527 | -34,430 | -33,062 | -20,005 | - | - |
Cash flows from investing activities: | ||||||
Net cash used in operating activities | ||||||
- | - | - | - | - | -15,606 | -3,430 |
Purchases of property and equipment | ||||||
196 | 859 | 817 | 1,137 | 1,032 | 1,619 | 194 |
Proceeds from the sale of property and equipment | ||||||
- | - | 2 | - | - | - | - |
Net cash used in investing activities | ||||||
-196 | -859 | -814 | -1,137 | -1,032 | - | - |
Cash flows from financing activities: | ||||||
Costs of trademark | ||||||
- | - | - | - | - | - | 4 |
Net cash used in investing activities | ||||||
- | - | - | - | - | -1,619 | -199 |
Payment of deferred offering costs | ||||||
- | - | - | - | - | - | 88 |
Repurchase of restricted common stock | ||||||
- | - | - | - | - | - | 29 |
Proceeds from IPO, net of underwriter's discount and offering expenses | ||||||
- | - | - | - | - | 24,872 | 0 |
Proceeds from the sale of stock to a strategic investor, net | ||||||
- | - | - | - | - | 900 | 0 |
Sale of Warrant to IPO underwriter | ||||||
- | - | - | - | - | 1 | 0 |
Proceeds from secondary offering, net of underwriter's discount and offering expenses | ||||||
- | - | - | - | - | 20,993 | 0 |
Proceeds from shares issued under shelf registration, net of underwriter's discount and offering expenses | ||||||
- | - | - | - | 19,048 | 0 | 0 |
Net proceeds from the sales of common stock | ||||||
23,319 | 38,846 | - | 34,788 | - | 0 | 200 |
Net proceeds from an at-the-market ("ATM") offering | ||||||
4,557 | - | - | - | - | - | - |
Net proceeds from issuance of shares to private investors | ||||||
- | - | 14,932 | - | - | - | - |
Proceeds from the exercise of stock options | ||||||
400 | 1,319 | 979 | 382 | 65 | 0 | 0 |
Proceeds from the sale of senior secured convertible notes | ||||||
- | - | - | - | - | - | 5,500 |
Proceeds from contributions to employee stock purchase plan | ||||||
457 | 531 | 869 | 727 | 289 | 0 | 0 |
Proceeds from the disgorgement of short-swing profit | ||||||
- | - | - | - | 12 | 0 | 0 |
Net cash provided by financing activities | ||||||
28,394 | 40,698 | 16,781 | 35,585 | 19,416 | - | - |
Net (decrease) increase in cash and cash equivalents | ||||||
1,577 | 7,311 | -18,463 | - | - | - | - |
Net cash provided by financing activities | ||||||
- | - | - | - | - | 46,766 | 5,582 |
Net increase (decrease) in cash and cash equivalents | ||||||
- | - | - | 1,386 | -1,622 | 29,540 | 1,952 |
Supplemental disclosure of non-cash financing activities: | ||||||
Decrease in deferred offering costs charge to the IPO | ||||||
- | - | - | - | - | 88 | 0 |
Common stock issued upon conversion of notes payable and accrued interest payable | ||||||
- | - | - | - | - | 26,790 | 0 |
Increase in additional paid in capital upon extinguishment of derivative liability for warrants | ||||||
- | - | - | - | - | 5,752 | 0 |
Common stock issued to landlord for tenant improvement of $100,000 and prepaid rent of $400,000 | ||||||
- | - | - | - | - | 500 | 0 |
Common stock issued for services | ||||||
- | - | - | - | 147 | 900 | 0 |
Cashless exercise of warrants | ||||||
- | - | - | 0 | 0 | 0 | - |
Increase in accrued expenses for the purchase of property and equipment | ||||||
- | - | - | 299 | - | 0 | - |
Restricted Stock Units (RSUs) [Member] | ||||||
Shares repurchased for tax withholdings on vesting | ||||||
10 | - | - | - | - | - | - |
Common stock issued | ||||||
0 | 0 | 0 | - | - | - | - |
Performance Shares [Member] | ||||||
Shares repurchased for tax withholdings on vesting | ||||||
329 | - | - | - | - | - | - |
Common stock issued | ||||||
- | 0 | 0 | - | - | - | - |