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Stock-Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Summary of Share Available for Grant Under the 2019 Plan | The following table summarizes the activity in the shares available for grant under the Plans during the six months ended June 30, 2021 (in thousands, except exercise price):
|  |  |  |  |  | Options outstanding |
|  |  |  |  |  |  |  |  |  | Weighted |
|  | Shares |  |  |  |  |  |  | Average |
|  | Available |  |  | Number of |  |  | Exercise |
|  | for Grant |  |  | Shares |  |  | Prices |
Balance as of January 1, 2021 |  |  | 81 |  |  |  | 159 |  |  | $ | 10.82 |
RSUs granted |  |  | (10 | ) |  |  | — |  |  |  | — |
Balance as of March 31, 2021 |  |  | 71 |  |  |  | 159 |  |  | $ | 10.82 |
RSUs granted |  |  | (59 | ) |  |  | — |  |  |  | — |
Balance as of June 30, 2021 |  |  | 12 |  |  |  | 159 |  |  | $ | 10.82 |
Summary of RSU's Activity Under Plans | A summary of RSUs activity under the Plans is presented below (in thousands, except for fair value):
|  |  |  |  |  | Weighted |
|  |  |  |  |  | Average |
|  | Number of |  |  | Grant-Date |
|  | Shares |  |  | Fair Value |
Non-vested shares as of January 1, 2021 |  |  | 65 |  |  | $ | 3.48 |
Granted |  |  | 10 |  |  | $ | 3.25 |
Vested |  |  | (17 | ) |  | $ | 3.78 |
Non-vested shares as of March 31, 2021 |  |  | 58 |  |  | $ | 3.35 |
Granted |  |  | 59 |  |  | $ | 6.70 |
Vested |  |  | (2 | ) |  | $ | 3.11 |
Non-vested shares as of June 30, 2021 |  |  | 115 |  |  | $ | 5.08 |
Summary of Significant Ranges of Outstanding and Exercisable Options | The following table summarizes significant ranges of outstanding and exercisable options as of June 30, 2021 (in thousands, except contractual life and exercise price):
|  | Options Outstanding |  |  | Options Exercisable |
|  |  |  |  |  | Weighted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  | Average |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  | Remaining |  |  | Weighted |  |  |  |  |  |  | Weighted |  |  |  |  |
|  |  |  |  |  | Contractual |  |  | Average |  |  |  |  |  |  | Average |  |  | Aggregate |
|  | Number |  |  | Life |  |  | Exercise |  |  | Number |  |  | Exercise |  |  | Intrinsic |
Range of Exercise Price |  | Outstanding |  |  | (in Years) |  |  | Price |  |  | Exercisable |  |  | Price |  |  | value |
$1.57 - $14.99 |  |  | 143 |  |  |  | 7.77 |  |  | $ | 2.62 |  |  |  | 90 |  |  | $ | 2.84 |  |  | $ | 521 |
$15.00 - $25.59 |  |  | 8 |  |  |  | 2.24 |  |  | $ | 15.00 |  |  |  | 8 |  |  | $ | 15.00 |  |  | $ | — |
$25.60 - $143.99 |  |  | 2 |  |  |  | 2.86 |  |  | $ | 41.81 |  |  |  | 2 |  |  | $ | 41.81 |  |  | $ | — |
$144.00 - $409.99 |  |  | 5 |  |  |  | 5.15 |  |  | $ | 144.00 |  |  |  | 5 |  |  | $ | 144.00 |  |  | $ | — |
$410.00 - $924.00 |  |  | 1 |  |  |  | 3.69 |  |  | $ | 430.64 |  |  |  | 1 |  |  | $ | 430.64 |  |  | $ | — |
$1.57 - $924.00 |  |  | 159 |  |  |  | 7.30 |  |  | $ | 10.82 |  |  |  | 106 |  |  | $ | 15.09 |  |  | $ | 521 |

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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=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + 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 -URI http://asc.fasb.org/extlink&oid=120381028&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=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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