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Stockholders' Equity (Deficit) (Tables) | 12 Months Ended
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Dec. 31, 2019
Equity [Abstract] |
Schedule of Key Assumptions Used to Determine Fair Value of Options Granted | The weighted-averages for key assumptions used in determining the fair value of stock options granted were as follows:
| Year Ended December 31,
| 2019 |  | 2018
Volatility | 59.32% |  | 57.76%
Risk-free interest rate | 2.42% |  | 2.65%
Expected life (years) | 6.17 |  | 6.24
Dividend yield rate | —% |  | —%
Schedule of Stock Options Activity | A summary of stock option activity under the Plan for the year ended December 31, 2019, is presented below:
|  |  |  |  | Weighted |  |
|  |  | Weighted |  | Average |  |
|  |  | Average |  | Remaining |  | Aggregate
| Stock |  | Exercise |  | Contractual |  | Intrinsic
| Options |  | Per Share |  | Terms (Years) |  | Value
Outstanding, December 31, 2018 | 3,257,801 |  |  | $ | 11.99 |  |  | 9.26 |  | $ | 7,119 |
Granted | 1,321,451 |  |  | $ | 18.63 |  |  |  |  |
Exercised | (273,734 | ) |  | $ | 9.98 |  |  |  |  |
Cancelled/forfeited | (328,117 | ) |  | $ | 15.15 |  |  |  |  |
Outstanding, December 31, 2019 | 3,977,401 |  |  | $ | 14.07 |  |  | 8.51 |  | $ | 7,198 |
Exercisable, December 31, 2019 | 800,595 |  |  | $ | 12.50 |  |  | 8.28 |  | $ | 1,880 |
Vested and expected to vest, December 31, 2019 | 3,977,401 |  |  | $ | 14.07 |  |  | 8.51 |  | $ | 7,198 |
Schedule of RSUs Activity | A summary of RSUs activity under the Plan for the year ended December 31, 2019, is presented below:
|  |  | Weighted
| Restricted |  | Average
| Stock |  | Grant Date
| Units |  | Fair Value
Outstanding, December 31, 2018 | 271,404 |  |  | $ | 16.53 |
Granted | 3,000 |  |  | $ | 18.33 |
Vested | (25,125 | ) |  | $ | 24.81 |
Forfeited | (19,409 | ) |  | $ | 13.71 |
Outstanding, December 31, 2019 | 229,870 |  |  | $ | 15.89 |
Schedule of Stock-based Compensation Expense | The following table summarizes stock-based compensation expense arising from the above Plan:
| Year Ended December 31,
| 2019 |  | 2018
Selling, general and administrative | $ | 8,862 |  |  | $ | 5,570 |
Research and development | 656 |  |  | 1,401 |
Total stock-based compensation expense | $ | 9,518 |  |  | $ | 6,971 |

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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 of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + 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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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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