| Dec'19 | Dec'18 | Dec'17 | Dec'16 | Dec'15 | Dec'14 | Dec'13 | Dec'12 | Dec'11 | Dec'10 | Dec'09 |
|---|---|---|---|---|---|---|---|---|---|---|
Operating Activities: | ||||||||||
Net income (loss) | ||||||||||
31,875 | -34,003 | -18,412 | -18,072 | -20,232 | -15,509 | -12,154 | -4,076 | -6,391 | -4,006 | -7,241 |
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: | ||||||||||
Depreciation | ||||||||||
54 | 37 | 45 | 43 | 34 | 26 | 22 | 10 | 42 | 25 | 30 |
Amortization of right-of-use asset | ||||||||||
243 | - | - | - | - | - | - | - | - | - | - |
Stock-based compensation | ||||||||||
3,824 | 3,550 | 2,407 | 1,836 | 1,585 | 777 | 175 | 340 | 416 | 450 | 601 |
Change in accrued interest and accretion of discount on investments | ||||||||||
290 | 443 | 186 | -886 | -65 | 993 | 1,890 | -1,129 | -319 | - | - |
(Increase) decrease in: | ||||||||||
Accounts receivable, net | ||||||||||
10,536 | - | - | - | - | - | - | - | - | - | - |
Inventory | ||||||||||
1,900 | 56 | - | - | - | - | - | - | - | - | - |
Interest receivable | ||||||||||
- | - | - | - | - | - | - | - | - | - | -12 |
Government grant receivable | ||||||||||
- | - | - | - | - | - | - | - | -134 | 134 | - |
Prepaid expenses and other current assets and deposits | ||||||||||
2,701 | 476 | 125 | -456 | 452 | 2,943 | 299 | 1,110 | 31 | 58 | -39 |
Increase (decrease) in: | ||||||||||
Accounts payable | ||||||||||
1,780 | 391 | 1,012 | -860 | -20 | 963 | -514 | 1,101 | 158 | -143 | -83 |
Accrued expenses and other liabilities | ||||||||||
12,540 | 4,850 | 1,142 | -480 | 1,134 | 2,748 | 1,005 | -276 | 365 | 108 | -1,041 |
Operating lease liability | ||||||||||
276 | - | - | - | - | - | - | - | - | - | - |
Net cash provided by (used in) operating activities | ||||||||||
34,611 | -26,147 | -13,742 | -17,963 | -18,015 | -12,941 | -9,875 | -5,140 | -4,985 | -3,757 | -7,683 |
Investing Activities: | ||||||||||
Purchases of property and equipment | ||||||||||
19 | 92 | - | 96 | 23 | 57 | 9 | 52 | 3 | 2 | 2 |
Purchases of investments | ||||||||||
34,725 | 36,790 | 3 | 68 | -18 | 8,979 | 9,978 | 7,504 | - | - | - |
Proceeds from maturities and sales of investments | ||||||||||
71,969 | 21,800 | - | 3,717 | -1 | 296 | 2,491 | -6,502 | - | - | - |
Net cash provided by (used in) investing activities | ||||||||||
37,224 | -15,082 | -3 | 3,552 | -6 | -8,741 | -7,496 | -14,059 | -3 | -2 | -2 |
Financing Activities: | ||||||||||
Proceeds from issuance of common stock, net | ||||||||||
- | - | 53,772 | - | 34,873 | 26,725 | 14,071 | 9,564 | 5,542 | 1,456 | 3,698 |
Payment of employee withholding tax related to stock-based compensation | ||||||||||
0 | 4 | - | 11 | - | - | - | - | - | - | - |
Proceeds from issuance of convertible promissory note | ||||||||||
- | - | - | - | - | - | - | 5,000 | - | - | - |
Proceeds from exercise of warrants | ||||||||||
- | - | 3,209 | - | 1,895 | 1,316 | 4,083 | 16 | - | - | - |
Proceeds from exercise of stock options | ||||||||||
1,116 | 297 | 368 | 80 | 390 | 522 | 23 | - | - | - | - |
Net cash provided by (used in) financing activities | ||||||||||
1,116 | 293 | 57,350 | 68 | 37,159 | 28,563 | 18,178 | 14,580 | 5,542 | 1,456 | 3,698 |
Net increase (decrease) in cash and cash equivalents | ||||||||||
72,952 | -40,937 | 43,603 | -14,341 | 19,138 | 6,880 | 806 | -4,619 | 553 | -2,304 | -3,987 |
Non-cash investing and financing activities: | ||||||||||
Unrealized gain (loss) on available-for-sale securities | ||||||||||
29 | -20 | - | - | - | - | - | - | - | - | - |
Exercise of liability classified warrants for common stock | ||||||||||
- | - | 309 | - | 1,721 | 18 | 569 | 16 | - | - | - |
Non-cash incentive received from lessor | ||||||||||
- | - | - | - | 131 | - | - | - | - | - | - |
Conversion of note to common stock | ||||||||||
- | - | - | - | - | - | - | 5,000 | - | - | - |