| 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 | Dec'15 | Sep'15 | Jun'15 | Mar'15 | Dec'14 | Sep'14 | Jun'14 | Mar'14 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Revenues | ||||||||||||||||||||||||
9,552 | 9,131 | 8,597 | 8,207 | 7,946 | 7,915 | 0 | 0 | 0 | - | 0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
Revenues | ||||||||||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | 15,945 | 18,166 | 19,214 | 17,392 | 14,797 | 13,164 | 10,713 | 10,929 | 10,840 | 11,182 | 11,213 | 0 | 0 | 0 |
Cost of revenues | ||||||||||||||||||||||||
6,557 | 6,264 | 6,099 | 6,013 | 6,583 | 6,531 | 6,795 | 8,592 | 10,342 | 13,002 | 14,966 | 15,434 | 15,160 | 14,445 | 12,553 | 10,561 | 8,550 | 6,478 | 6,243 | 5,964 | 6,298 | 6,513 | 0 | 0 | 0 |
Gross profit | ||||||||||||||||||||||||
2,995 | 2,867 | 2,498 | 2,194 | 1,363 | 1,384 | 1,005 | -741 | -2,090 | -3,068 | -2,266 | 511 | 3,006 | 4,769 | 4,839 | 4,236 | 4,614 | 4,235 | 4,686 | 4,876 | 4,884 | 4,700 | 0 | 0 | 0 |
Operating expenses: | ||||||||||||||||||||||||
Research and development | ||||||||||||||||||||||||
5,872 | 5,692 | 5,789 | 5,822 | 5,646 | 6,009 | 6,317 | 7,235 | 9,173 | 11,319 | 13,373 | 14,642 | 15,412 | 15,536 | 15,433 | 15,797 | 15,881 | 15,694 | 14,640 | 13,416 | 12,228 | 11,224 | 0 | 0 | 0 |
Selling, general and administrative | ||||||||||||||||||||||||
16,934 | 16,534 | 17,129 | 17,537 | 17,890 | 18,404 | 18,128 | 18,557 | 20,302 | 25,120 | 29,349 | 33,835 | 37,107 | 39,950 | 40,465 | 37,943 | 35,027 | 29,231 | 25,405 | 23,088 | 20,729 | 18,503 | 0 | 0 | 0 |
Restructuring charges | ||||||||||||||||||||||||
- | - | - | - | - | - | - | - | - | - | 0 | 0 | - | - | - | - | - | - | - | - | - | - | - | - | - |
Total operating expenses | ||||||||||||||||||||||||
22,806 | 22,226 | 22,918 | 23,359 | 23,536 | 24,413 | 26,555 | 28,318 | 32,520 | 39,484 | 43,657 | 48,996 | 52,519 | 55,486 | 55,898 | 53,740 | 50,908 | 44,925 | 40,045 | 36,504 | 32,957 | 29,727 | 0 | 0 | 0 |
Loss from operations | ||||||||||||||||||||||||
-19,811 | -19,359 | -20,420 | -21,165 | -22,173 | -23,029 | -25,550 | -29,059 | -34,610 | -42,552 | -45,923 | -48,485 | -49,513 | -50,717 | -51,059 | -49,504 | -46,294 | -40,690 | -35,359 | -31,628 | -28,073 | -25,027 | 0 | 0 | 0 |
Interest income | ||||||||||||||||||||||||
236 | 288 | 319 | 303 | 263 | 214 | 157 | 128 | 109 | 108 | 125 | 127 | 124 | 125 | 105 | 89 | 70 | 40 | 24 | 13 | 4 | 2 | 0 | 0 | 0 |
Interest expense | ||||||||||||||||||||||||
1,528 | 1,480 | 1,425 | 1,372 | 1,370 | 5,692 | 6,937 | 8,212 | 9,421 | 6,299 | 6,284 | 6,238 | 5,902 | 5,524 | 5,126 | 4,907 | 5,016 | 5,167 | 5,112 | 5,490 | 5,766 | 6,016 | 0 | 0 | 0 |
Other (expense) income, net | ||||||||||||||||||||||||
857 | 1,101 | 1,107 | 1,050 | 948 | 949 | 712 | 470 | 249 | 11 | 4 | -8 | -10 | -12 | -9 | -2,055 | -1,855 | -1,527 | 0 | 0 | 0 | - | - | - | - |
Other income (expense), net | ||||||||||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 0 | 0 | 0 |
Loss before provision for income taxes | ||||||||||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | -47,344 | -42,664 | -36,472 | 0 | - | 0 | 0 | - |
Loss before provision for income taxes | ||||||||||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 0 |
Provision for income taxes | ||||||||||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | -23 | -13 | -6 | 14 | 0 | 0 | 0 |
Net loss and comprehensive loss | ||||||||||||||||||||||||
-20,246 | -19,450 | -20,419 | -21,184 | -22,332 | -27,558 | -31,618 | -36,673 | -43,673 | -48,732 | -52,078 | -54,604 | -55,301 | -56,128 | -56,089 | -56,370 | -53,094 | -47,344 | -42,022 | -37,552 | -34,410 | -31,964 | 0 | 0 | 0 |
Comprehensive loss | ||||||||||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | 0 | - | - | - | - | - | - | - | - | - | - | - | - | - |
Accretion of preferred stock dividends | ||||||||||||||||||||||||
3,652 | 3,580 | 3,521 | 3,462 | 3,403 | 2,918 | 0 | 0 | 0 | - | 0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
Deemed dividend arising from beneficial conversion feature of convertible preferred stock | ||||||||||||||||||||||||
- | - | - | - | - | 5,216 | 0 | 0 | 0 | - | 0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
Adjustment to net loss resulting from convertible preferred stock modification | ||||||||||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 2,384 | 0 | 0 | 0 | - | - | - | - |
Net loss attributable to common stockholders | ||||||||||||||||||||||||
-23,898 | -23,030 | -23,940 | -24,646 | -25,735 | -35,692 | -38,916 | -43,135 | -49,299 | -48,732 | 0 | 0 | 0 | - | - | - | - | -49,728 | -44,406 | -39,936 | -36,794 | -31,964 | 0 | 0 | 0 |
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share) | ||||||||||||||||||||||||
-0.47 | -0.21 | -0.70 | -0.87 | -1.40 | -10.04 | -5.56 | -9.83 | -7.99 | -10.40 | -17.20 | -21.40 | -25.74 | -103.89 | -29.34 | -1.06 | -1.28 | -171.66 | -1.08 | -0.83 | -1.53 | -5,228.71 | -36.43 | -29.25 | -32.94 |
Weighted average common shares used to compute net loss per share, basic and diluted (in shares) | ||||||||||||||||||||||||
14,616 | 10,431 | 7,900 | 6,377 | 4,248 | 486 | 1,119 | 675 | 1,992 | 807 | 607 | 598 | 596 | -24,189 | 442 | 12,734 | 12,669 | -31,757 | 12,280 | 12,240 | 8,373 | 23 | 0 | 0 | 0 |