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Stockholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2020
Equity [Abstract] |
Summary of Stock Options Activity | The activity for stock options under the Company’s stock plans for the nine months ended September 30, 2020 is as follows:
|  |  |  |  |  |  |  |  |  |  |  | Remaining |  |  |  |  |
|  |  |  |  |  |  |  |  |  |  |  | weighted- |  |  |  |  |
|  |  |  |  |  |  |  | Weighted- |  |  | average |  |  | Per share |
|  |  |  |  |  |  |  | average |  |  | contractual |  |  | average |
|  |  |  |  |  | Price per |  | exercise |  |  | terms |  |  | intrinsic |
|  | Options |  |  | share |  | price |  |  | (in years) |  |  | value |
Outstanding as of December 31, 2019 |  |  | 980,884 |  |  | $0.75-$83.30 |  | $ | 35.24 |  |  |  | 2.84 |  |  | $ | 34.07 |
Exercised |  |  | (9,324 | ) |  | 1.17-44.19 |  |  | 20.00 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (6,779 | ) |  | 44.19-56.72 |  |  | 48.23 |  |  |  |  |  |  |  |  |
Outstanding as of September 30, 2020 |  |  | 964,781 |  |  | 0.75-83.30 |  |  | 35.30 |  |  |  | 2.09 |  |  |  | 5.56 |
Vested and exercisable as of September 30, 2020 |  |  | 964,781 |  |  | 0.75-83.30 |  |  | 35.30 |  |  |  | 2.09 |  |  |  | 5.56 |
Vested and expected to vest as of September 30, 2020 |  |  | 964,781 |  |  | $0.75-$83.30 |  | $ | 35.30 |  |  |  | 2.09 |  |  | $ | 5.56 |
Summary of Restricted Stock Activity | Stock Awards activity for the nine months ended September 30, 2020 is summarized below:
|  |  |  |  |  |  |  |  |  |  |  |  |  | Weighted- |
|  |  |  |  |  |  |  |  |  |  |  |  |  | average |
|  |  |  |  |  |  |  |  |  |  |  |  |  | grant |
|  |  |  |  |  | Performance |  |  |  |  |  |  | date fair |
|  |  |  |  |  | and |  |  |  |  |  |  | value |
Restricted stock units |  | Time-based |  |  | time-based |  |  | Total |  |  | per share |
Unvested restricted stock units as of December 31, 2019 |  |  | 108,976 |  |  |  | 3,134 |  |  |  | 112,110 |  |  | $ | 83.48 |
Granted |  |  | 202,924 |  |  |  | 88,458 |  |  |  | 291,382 |  |  |  | 43.85 |
Vested |  |  | (42,040 | ) |  |  | — |  |  |  | (42,040 | ) |  |  | 83.06 |
Forfeited/canceled |  |  | (18,858 | ) |  |  | (3,134 | ) |  |  | (21,992 | ) |  |  | 76.90 |
Unvested restricted stock units as of September 30, 2020 (1) |  |  | 251,002 |  |  |  | 88,458 |  |  |  | 339,460 |  |  | $ | 50.52 |
Unvested and expected to vest restricted stock units outstanding as of September 30, 2020 |  |  |  |  |  |  |  |  |  |  | 251,623 |  |  | $ | 51.24 |
|  |  |  |  |  |  |  |  |  |  |  |  |  | Weighted- |
|  |  |  |  |  |  |  |  |  |  |  |  |  | average |
|  |  |  |  |  |  |  |  |  |  |  |  |  | grant |
|  |  |  |  |  | Performance |  |  |  |  |  |  | date fair |
|  |  |  |  |  | and |  |  |  |  |  |  | value |
Restricted stock awards |  | Time-based |  |  | time-based |  |  | Total |  |  | per share |
Unvested restricted stock awards outstanding as of December 31, 2019 |  |  | 71,070 |  |  |  | 62,628 |  |  |  | 133,698 |  |  | $ | 95.74 |
Vested |  |  | (22,704 | ) |  |  | — |  |  |  | (22,704 | ) |  |  | 89.76 |
Forfeited/canceled |  |  | — |  |  |  | (29,273 | ) |  |  | (29,273 | ) |  |  | 110.27 |
Unvested restricted stock awards outstanding as of September 30, 2020 (1) |  |  | 48,366 |  |  |  | 33,355 |  |  |  | 81,721 |  |  | $ | 93.42 |
Unvested and expected to vest restricted stock awards outstanding as of September 30, 2020 |  |  |  |  |  |  |  |  |  |  | 50,193 |  |  | $ | 86.23 |
(1) | Outstanding restricted stock units and restricted stock awards are based on the maximum payout of the targeted number of shares.
Summary of Stock-based Compensation Expense | Stock-based compensation Stock-based compensation expense recognized for the three and nine months ended September 30, 2020 and September 30, 2019, was as follows:
|  | Three months ended |  |  | Nine months ended |
|  | September 30, |  |  | September 30, |
|  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Stock-based compensation expense by type of award: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock option plan awards |  | $ | — |  |  | $ | 590 |  |  | $ | 709 |  |  | $ | 2,513 |
Restricted stock units and restricted stock awards |  |  | 1,878 |  |  |  | 834 |  |  |  | 4,853 |  |  |  | 3,882 |
Employee stock purchase plan |  |  | 172 |  |  |  | 141 |  |  |  | 549 |  |  |  | 535 |
Total stock-based compensation expense |  | $ | 2,050 |  |  | $ | 1,565 |  |  | $ | 6,111 |  |  | $ | 6,930 |
For the three and nine months ended September 30, 2020 and September 30, 2019, respectively, stock-based compensation expense recognized under ASC 718, included in cost of revenue, research and development expense, sales and marketing expense, and general and administrative expense was as follows:
|  | Three months ended |  |  | Nine months ended |
|  | September 30, |  |  | September 30, |
|  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Cost of revenue |  | $ | 185 |  |  | $ | 172 |  |  | $ | 511 |  |  | $ | 656 |
Research and development |  |  | 233 |  |  |  | 221 |  |  |  | 726 |  |  |  | 825 |
Sales and marketing |  |  | 516 |  |  |  | 263 |  |  |  | 1,587 |  |  |  | 1,289 |
General and administrative |  |  | 1,116 |  |  |  | 909 |  |  |  | 3,287 |  |  |  | 4,160 |
Total stock-based compensation expense |  | $ | 2,050 |  |  | $ | 1,565 |  |  | $ | 6,111 |  |  | $ | 6,930 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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