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EQUITY AWARDS - Schedule of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019 | Dec. 31, 2018
Number of Shares |  |  |  |
Outstanding at beginning of year (in shares) | 508,000 | 537,872 | 537,872 |
Granted (in shares) | 23,000 | 19,000 |  |
Exercised (in shares) | (3,000) | (19,172) |  |
Forfeited (in shares) | (24,400) | (16,400) |  |
Balance (in shares) | 503,600 | 521,300 | 508,000 | 537,872
Exercisable |  |  |  |
Outstanding (in shares) | 260,880 | 194,140 |  |
Weighted-average exercise price (in USD per share) | $ 25.26 | $ 24.52 |  |
Weighted-average remaining contractual life in years | 5 years 3 days | 5 years 4 months 28 days |  |
Aggregate intrinsic value | $ 7 | $ 938 |  |
Weighted-Average Exercise Price |  |  |  |
Outstanding at beginning of year (in USD per share) | $ 26.68 | $ 26.49 | $ 26.49 |
Granted (in USD per share) | 29.00 | 29.80 |  |
Exercised (in USD per share) | 24.00 | 25.08 |  |
Forfeited (in USD per share) | 31.72 | 28.90 |  |
Balance (in USD per share) | $ 26.55 | $ 26.59 | $ 26.68 | $ 26.49
Weighted-Average Remaining Contractual Life in Years |  |  |  |
Outstanding | 6 years 25 days | 6 years 9 months 14 days | 6 years 2 months 26 days | 6 years 11 months 15 days
Granted | 9 years 10 months 2 days | 9 years 10 months 24 days |  |
Exercised | 2 years 6 months 14 days | 6 years 1 month 20 days |  |
Forfeited | 8 years 5 months 15 days | 8 years 5 months 26 days |  |
Aggregate Intrinsic Value |  |  |  |
Outstanding | $ 3,159 | $ 2,088 | $ 2,088 |
Granted | 11 | 0 |  |
Exercised | 0 | 79 |  |
Forfeited | 0 | 27 |  |
Outstanding | $ 21 | $ 1,745 | $ 3,159 | $ 2,088

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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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