| Dec'19 | Dec'18 | Dec'17 | Dec'16 | Dec'15 | Dec'14 | Dec'13 | Dec'12 | Sep'12 | Dec'11 |
|---|---|---|---|---|---|---|---|---|---|
Cash flows from operating activities: | |||||||||
Net loss | |||||||||
-13,007 | -11,660 | -20,982 | -18,971 | -18,208 | -20,372 | -10,590 | 3,886 | -76 | -5 |
Adjustments to reconcile net loss to cash used in operating activities: | |||||||||
Depreciation expense | |||||||||
15 | 18 | 28 | 31 | 26 | 14 | 21 | 42 | - | - |
Forgiveness of related party receivable | |||||||||
- | - | - | - | - | - | 3 | 0 | - | - |
Stock-based compensation expense | |||||||||
1,035 | 1,457 | 2,716 | 2,372 | 1,150 | 1,892 | 979 | 127 | - | - |
Loss on disposition of property and equipment | |||||||||
0 | -37 | 0 | 0 | - | - | - | - | - | - |
Non-cash interest expense | |||||||||
221 | 259 | 0 | 0 | 181 | 0 | - | - | - | - |
Non-cash gain on change in fair value of warrant liability | |||||||||
236 | 0 | - | - | - | - | - | - | - | - |
Amortization of discount on marketable investment securities | |||||||||
164 | 198 | 99 | -224 | - | - | - | - | - | - |
Settlement for termination of certain rights in stock purchase agreement | |||||||||
- | - | - | - | - | - | 913 | 0 | - | - |
Changes in operating assets and liabilities: | |||||||||
Accrued interest income | |||||||||
-21 | 15 | -15 | -105 | 144 | 0 | - | - | - | - |
Litigation insurance recovery | |||||||||
0 | -3,319 | 3,319 | 0 | 0 | - | - | - | - | - |
Accounts receivable | |||||||||
- | - | - | - | - | - | - | -313 | - | - |
Prepaid and other current assets | |||||||||
25 | 111 | 78 | -20 | 120 | -540 | 679 | -4 | - | - |
Related party receivable | |||||||||
- | - | - | - | - | - | - | -4 | - | - |
Accounts payable | |||||||||
510 | 73 | 352 | -261 | 200 | -449 | 668 | -60 | - | - |
Litigation settlement payable | |||||||||
0 | -4,250 | 4,250 | 0 | 0 | - | - | - | - | - |
Accrued expenses | |||||||||
-37 | -1,009 | 416 | -1,804 | 1,557 | 1,070 | 148 | 24 | - | - |
Refund of long-term rental deposit | |||||||||
- | - | - | - | - | - | 0 | - | - | - |
Deferred revenues | |||||||||
- | - | - | - | - | - | - | -7,523 | - | - |
Accounts payable and accrued liabilities | |||||||||
- | - | - | - | - | - | - | - | 6 | 7 |
Cash used in operating activities | |||||||||
-11,666 | -12,078 | -16,702 | -18,281 | -15,356 | - | - | -3,178 | -70 | -7 |
Cash flows from investing activities: | |||||||||
Income taxes payable | |||||||||
- | - | - | - | - | - | -55 | 0 | - | - |
Cash used in operating activities | |||||||||
- | - | - | - | - | -17,304 | -8,588 | - | - | - |
Refund of rental deposit | |||||||||
0 | -7 | 0 | 7 | - | -21 | - | - | - | - |
Purchases of marketable investment securities | |||||||||
16,851 | 25,552 | - | - | - | - | - | - | - | - |
Payment of rental deposit | |||||||||
- | - | - | - | 0 | - | - | - | - | - |
Purchases or disposal of property and equipment | |||||||||
- | - | 0 | 59 | 28 | 59 | 1 | 12 | - | - |
Purchases of marketable investment securities | |||||||||
- | - | 33,055 | 25,272 | 25,789 | 0 | - | - | - | - |
Maturities of marketable investment securities | |||||||||
19,849 | 36,838 | 36,182 | 28,568 | 800 | 0 | - | - | - | - |
Cash provided by investing activities | |||||||||
- | - | - | - | - | -38 | -1 | - | 0 | 0 |
Cash provided by (used in) investing activities | |||||||||
2,998 | 11,293 | 3,126 | 3,229 | -25,018 | - | - | -12 | 0 | 0 |
Cash flows from financing activities: | |||||||||
Proceeds from debt | |||||||||
0 | 10,000 | 0 | 0 | - | - | - | - | - | - |
Debt repayments | |||||||||
3,333 | 0 | - | - | - | - | - | - | - | - |
Proceeds from stock option exercises | |||||||||
56 | 0 | 581 | 605 | 276 | 16 | 10 | 0 | - | - |
Proceeds from sale of Class A and Class B units | |||||||||
5,595 | 0 | - | - | - | - | - | - | - | - |
Proceeds from exercise of pre-funded warrants | |||||||||
0 | 0 | - | - | - | - | - | - | - | - |
Net proceeds from sale of common stock through ATM | |||||||||
- | - | - | - | 0 | - | - | - | - | - |
Payment of accrued common stock offering costs | |||||||||
- | - | - | - | - | 271 | 0 | - | 0 | -9 |
Net proceeds from PIPE common stock offering | |||||||||
- | - | - | - | - | - | - | 0 | - | - |
Due to shareholders | |||||||||
- | - | - | - | - | - | - | - | 0 | 0 |
Net proceeds from common stock offering | |||||||||
8,000 | 652 | 10,644 | 0 | 32,439 | 0 | 48,518 | 0 | 70 | 30 |
Purchase of restricted stock from employees | |||||||||
- | - | - | - | - | - | 53 | 0 | - | - |
Cash provided by financing activities | |||||||||
- | - | - | - | - | -255 | 48,476 | - | - | - |
Cash provided by financing activities | |||||||||
10,318 | 10,652 | 11,226 | 605 | 32,716 | - | - | 0 | 70 | 30 |
Net increase in cash and cash equivalents | |||||||||
1,650 | 9,866 | - | - | - | - | - | - | - | - |
Net increase in cash and cash equivalents | |||||||||
- | - | -2,349 | -14,446 | -7,658 | -17,597 | 39,886 | -3,190 | 0 | 22 |
Supplemental disclosure of cash flow information: | |||||||||
Interest paid | |||||||||
545 | 533 | 0 | 0 | - | - | - | - | - | - |
Income taxes paid | |||||||||
0 | 0 | 0 | 0 | - | - | - | - | - | - |
Supplemental disclosure of non-cash investing and financing activity: | |||||||||
Net unrealized gain on available-for-sale securities | |||||||||
0 | 3 | 3 | 24 | - | - | - | - | - | - |
Accrued final payment charge on debt | |||||||||
221 | 259 | - | - | - | - | - | - | - | - |
Allocation of equity offering proceeds to warrant liability | |||||||||
4,827 | 0 | - | - | - | - | - | - | - | - |
Stock received as consideration for stock option exercises and recognized as treasury stock | |||||||||
- | - | - | - | - | 40 | 0 | - | - | - |
Net unrealized gain (loss) on available-for-sale securities | |||||||||
- | - | - | - | -32 | 0 | - | - | - | - |
Accrued final payment charge on debt | |||||||||
- | - | 0 | 0 | - | - | - | - | - | - |
Cash paid during the period for: Interest Paid | |||||||||
- | - | - | - | - | - | - | - | 0 | 0 |
Cash paid for income taxes | |||||||||
- | - | - | - | 0 | - | - | - | 0 | 0 |
Accrued common stock offering costs | |||||||||
- | - | - | - | - | - | - | 0 | - | - |