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Stockholders' Equity - Stock Option Activity Schedule (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Number of Options |  |
Outstanding, Beginning of year (in shares) | 2,231 |
Issued (in shares) | 300 |
Exercise (in shares) | (483) |
Forfeited / canceled (in shares) | (18) |
Outstanding, End of year (in shares) | 2,030 | 2,231
Exercisable, end of year (in shares) | 1,275 |
Weighted-Average Exercise Price |  |
Outstanding, beginning of year (USD per share) | $ 19.27 |
Issued (USD per share) | 17.00 |
Exercised (USD per share) | 17.78 |
Forfeited / canceled (USD per share) | 17.00 |
Outstanding, end of year (USD per share) | 19.31 | $ 19.27
Exercisable, weighted average exercise price (USD per share) | $ 20.25 |
Weighted-Average Remaining Contractual Term in Years |  |
Outstanding, weighted average remaining contractual term | 4 years 8 months 12 days | 4 years 9 months 18 days
Options exercisable, weighted average remaining contractual term | 3 years 7 months 6 days |
Aggregate Intrinsic Value |  |
Outstanding at January 1 | $ 0 |
Outstanding at December 31 | 7,981 | $ 0
Exercisable at year end | $ 3,816 |
Employee Stock Option |  |
Weighted-Average Exercise Price |  |
Outstanding, beginning of year (USD per share) | $ 6.30 | $ 5.81
Outstanding, end of year (USD per share) | $ 5.98 | $ 6.30

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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