| Mar'20 | Dec'19 | Sep'19 | Jun'19 | Mar'19 | Dec'18 | Sep'18 | Jun'18 | Mar'18 | Dec'17 | Sep'17 | Jun'17 | Mar'17 | Dec'16 | Sep'16 | Jun'16 | Mar'16 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Cash flows from operating activities: | ||||||||||||||||
Net income (loss) | ||||||||||||||||
-1,202 | 63 | -135 | 661 | 337 | 1,274 | 438 | -3,190 | -1,105 | - | - | - | - | - | - | - | - |
Net income (loss) | ||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | - | 385 | - | 1,183 | 1,311 | 139 |
Adjustments to reconcile net income (loss) to net cash used in operating activities: | ||||||||||||||||
Depreciation | ||||||||||||||||
122 | 120 | 105 | 91 | 177 | 164 | 157 | 144 | 121 | 99 | 114 | 107 | 115 | 137 | 121 | 118 | 117 |
Amortization | ||||||||||||||||
164 | 164 | 163 | 164 | 164 | 169 | 170 | 168 | 169 | 184 | 74 | 224 | 97 | 97 | 93 | 91 | 91 |
Fair market value adjustment - warrants | ||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | - | - | 0 | 0 | -381 | -78 |
Amortization of premium (discounts) on investments, net | ||||||||||||||||
-7 | 64 | 63 | 103 | 82 | 108 | 41 | 44 | 8 | - | - | - | - | - | - | - | - |
Stock-based compensation | ||||||||||||||||
668 | 599 | 549 | 542 | 514 | 374 | 408 | 1,769 | 358 | 272 | 213 | 176 | 73 | 74 | 111 | 83 | 28 |
Deferred tax liability | ||||||||||||||||
- | - | - | -13 | 5 | 8 | 3 | 16 | 2 | -65 | 46 | 11 | 9 | - | - | - | - |
Changes in operating assets and liabilities: | ||||||||||||||||
Trade accounts receivable | ||||||||||||||||
-640 | -908 | -1,158 | 1,742 | 967 | -376 | 534 | -962 | -238 | 709 | -388 | 0 | 2,357 | -611 | 1,146 | 941 | -52 |
Inventory | ||||||||||||||||
-197 | -72 | 170 | -188 | -68 | 134 | 424 | 274 | -222 | 131 | 0 | 68 | -38 | 41 | 27 | 30 | -73 |
Prepaid expenses and other assets | ||||||||||||||||
-238 | -311 | 459 | 118 | -77 | -15 | 239 | -493 | 510 | 24 | 338 | 88 | 75 | -94 | 121 | 176 | -83 |
Accounts payable | ||||||||||||||||
-291 | -608 | -926 | 727 | 504 | 258 | -96 | -114 | 246 | 21 | -205 | 39 | 42 | -234 | 482 | 1,176 | -349 |
Accrued bonus | ||||||||||||||||
-974 | -17 | 494 | 444 | -1,612 | 262 | 880 | 779 | -1,505 | 559 | 466 | 599 | -1,149 | 606 | 345 | 398 | -937 |
Accrued liabilities | ||||||||||||||||
-426 | -10 | -33 | 296 | -19 | -44 | -348 | -37 | -40 | 33 | -158 | 442 | -268 | 276 | -4 | 186 | -47 |
Deferred obligation under operating lease | ||||||||||||||||
-45 | -77 | -40 | -38 | -41 | -35 | -36 | -36 | -15 | -24 | -30 | -30 | -30 | -26 | -26 | -26 | -26 |
Net cash used in operating activities | ||||||||||||||||
-902 | 1,475 | 651 | 1,099 | -875 | 2,618 | 338 | 247 | -1,826 | - | - | - | - | - | - | - | - |
Cash flows from investing activities: | ||||||||||||||||
Purchases of available-for-sale securities | ||||||||||||||||
752 | - | - | - | 10,462 | - | - | - | - | - | - | - | - | - | - | - | - |
Net cash used in operating activities | ||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | - | -3,118 | - | 1,011 | 1,809 | -853 |
Purchases of available-for-sale securities | ||||||||||||||||
- | - | - | - | - | - | 11,679 | 8,925 | 3,724 | - | - | - | - | - | - | - | - |
Maturities of available-for-sale securities | ||||||||||||||||
11,400 | 5,750 | 8,650 | 11,285 | 9,585 | 4,036 | 11,776 | 7,680 | 7,500 | - | - | - | - | - | - | - | - |
Purchases of property and equipment | ||||||||||||||||
115 | 151 | 640 | 246 | 159 | 238 | 99 | 149 | 503 | 67 | 25 | 50 | 119 | 0 | 228 | 6 | 41 |
Net cash provided by (used in) investing activities | ||||||||||||||||
10,533 | -777 | -1,005 | 436 | -1,036 | -1,539 | -2 | -1,395 | 3,272 | - | - | - | - | - | - | - | - |
Cash flows from financing activities: | ||||||||||||||||
Net cash provided by (used in) investing activities | ||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | - | -119 | - | -228 | -6 | -41 |
Repayment of notes payable | ||||||||||||||||
- | - | - | - | - | 333 | 333 | 333 | 333 | 333 | 333 | 333 | 388 | 408 | 406 | 405 | 404 |
Reversal of costs related to initial public offering | ||||||||||||||||
- | - | - | - | - | - | - | - | - | - | 0 | 0 | 0 | - | - | - | - |
Repurchases of common stock | ||||||||||||||||
190 | 428 | 606 | 0 | 193 | 337 | 514 | 543 | 779 | - | - | - | - | - | - | - | - |
Proceeds from issuance of common stock, net | ||||||||||||||||
70 | - | - | - | 231 | - | - | - | - | - | - | - | - | - | - | - | - |
Proceeds from exercise of stock options | ||||||||||||||||
- | - | - | - | - | - | - | 196 | 103 | - | 70 | 113 | 323 | - | - | - | - |
Net cash provided by (used in) financing activities | ||||||||||||||||
-120 | -372 | -416 | 358 | 38 | -522 | -530 | -1,055 | -1,009 | - | - | - | - | - | - | - | - |
Net increase (decrease) in cash, cash equivalents and restricted cash | ||||||||||||||||
9,511 | - | - | - | -1,873 | - | - | - | - | - | - | - | - | - | - | - | - |
Supplemental disclosure of cash flow information: | ||||||||||||||||
Interest paid | ||||||||||||||||
- | - | - | - | 1 | 3 | 7 | 11 | 15 | - | - | - | - | - | - | - | - |
Interest paid | ||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | - | 32 | - | 41 | 47 | 52 |
Taxes paid | ||||||||||||||||
22 | 17 | 8 | 25 | 21 | 20 | 8 | 10 | 7 | - | - | - | - | - | - | - | - |
Supplemental disclosure of non-cash investing and financing activities: | ||||||||||||||||
Accretion of Series E, F, and G preferred redeemable convertible stock to redemption amount | ||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | - | - | 0 | 284 | 539 | 533 |
Accrual of property and equipment | ||||||||||||||||
21 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
Net cash used in financing activities | ||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | - | -64 | - | 10,783 | -580 | -404 |
Net increase (decrease) in cash and cash equivalents | ||||||||||||||||
- | - | - | - | - | - | - | -2,203 | 436 | - | -18,417 | -5,276 | -3,302 | 28,335 | 11,566 | 1,222 | -1,298 |