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STOCK OPTIONS - Summary of Restricted Stock Awards and Units Activity (Details) - Restricted Stock Awards And Units [Member] - $ / shares | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Number of Shares |  |
Outstanding at beginning of year (in shares) | 959 | 0
Vested (in shares) | 480 | 959
Released (in shares) | (1,439) | 0
Forfeited (in shares) | 0 | 0
Balance (in shares) | 0 | 959
Outstanding at beginning of year | $ 31.57 | $ 0
Vested | 31.57 | 31.57
Released | 31.57 | 0
Forfeited | 0 | 0
Balance | $ 0 | $ 31.57

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- Definition Number of shares under non-option equity instrument agreements that were cancelled as a result of occurrence of a terminating event. + 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)(iv)(3) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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