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Stock-based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Schedule of Stock-based Compensation Expense | Stock-based compensation expense for the three and nine months ended September 30, 2019 and 2018 is as follows:
| Three Months Ended |  |  | Nine Months Ended |
| September 30 |  |  | September 30 |
| 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Research and development | $ | 93 |  |  | $ | 10 |  |  | $ | 268 |  |  | $ | 21 |
Sales and marketing |  | 65 |  |  | 16 |  |  |  | 543 |  |  | 33 |
General and administrative |  | 114 |  |  | 28 |  |  |  | 5,045 |  |  | 57 |
Cost of revenues |  | 35 |  |  | 9 |  |  |  | 55 |  |  | 18 |
| $ | 307 |  |  | $ | 63 |  |  | $ | 5,911 |  |  | $ | 129 |
Summary of Stock Option Activity | Stock option activity for the nine months ended September 30, 2019 is as follows:
|  |  |  |  |  |  |  |  |  | Weighted average |  |  |  |  |
|  |  |  |  |  | Weighted average |  |  | remaining |  |  | Aggregate |
|  |  |  |  |  | exercise price |  |  | contractual life |  |  | Intrinsic |
|  | Options |  |  | per share |  |  | (in years) |  |  | Value |
Outstanding at January 1, 2019 |  |  | 1,320,197 |  |  | $ | 0.77 |  |  |  | 7.99 |  |  | $ | 8,465 |
Options granted |  |  | 637,213 |  |  | $ | 10.94 |  |  |  |  |  |  |  |  |
Options exercised |  |  | (85,559 | ) |  | $ | 0.81 |  |  |  |  |  |  |  |  |
Options forfeited |  |  | (150,730 | ) |  | $ | 6.64 |  |  |  |  |  |  |  |  |
Options cancelled |  |  | — |  |  | $ | — |  |  |  |  |  |  |  |  |
Outstanding at September 30, 2019 |  |  | 1,721,121 |  |  | $ | 4.02 |  |  |  | 7.93 |  |  | $ | 2,541 |
Vested and expected to vest at September 30, 2019 |  |  | 1,721,121 |  |  | $ | 4.02 |  |  |  | 7.93 |  |  | $ | 2,541 |
Vested at September 30, 2019 |  |  | 1,139,418 |  |  | $ | 2.72 |  |  |  | 7.33 |  |  | $ | 1,993 |

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901 + Details
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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=116856206&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=116856206&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=116856206&loc=d3e5070-113901 + Details
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