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STOCK-BASED COMPENSATION - 2015 EIP Restricted Stock Units (Details) - 2015 EIP Plan - Restricted Stock Units - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
May 15, 2019 | Mar. 04, 2019 | May 15, 2018 | Feb. 27, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Stock Awards |  |  |  |  |  |  |  |  |
Number of common shares outstanding in respect of RSUs |  |  |  |  | 228,781 |  | 228,781 |  | 216,304
Number of Shares |  |  |  |  |  |  |  |  |
Balance at the beginning of the period (in shares) |  |  |  |  |  |  | 149,170 |  |
Granted (in shares) | 29,580 | 106,079 | 14,268 | 37,346 |  |  | 135,659 |  |
Vested (in shares) |  |  |  |  |  |  | (26,745) |  |
Balance at the end of the period (in shares) |  |  |  |  | 258,084 |  | 258,084 |  |
Weighted Average Fair Value |  |  |  |  |  |  |  |  |
Balance at the beginning of the period (in dollars per share) |  |  |  |  |  |  | $ 12.42 |  |
Granted (in dollars per share) |  |  |  |  |  |  | 8.44 |  |
Vested (in dollars per share) |  |  |  |  |  |  | 15.92 |  |
Balance at the end of the period (in dollars per share) |  |  |  |  | $ 9.96 |  | $ 9.96 |  |
Weighted-average remaining contractual life |  |  |  |  |  |  | 1 year 2 months 19 days |  |
Additional disclosures |  |  |  |  |  |  |  |  |
Total fair value of shares vested |  |  |  |  |  |  | $ 230 | $ 450 |
Unrecognized compensation cost related to nonvested stock awards |  |  |  |  |  |  |  |  |
Unrecognized compensation cost |  |  |  |  | $ 866 |  | $ 866 |  |
Weighted-average period for recognition of unrecognized compensation cost |  |  |  |  |  |  | 1 year 2 months 19 days |  |
General and Administrative Expense |  |  |  |  |  |  |  |  |
Additional disclosures |  |  |  |  |  |  |  |  |
Recognized nonvested stock amortization expense |  |  |  |  | $ 343 | $ 425 | $ 954 | $ 1,213 |
Vested RSUs |  |  |  |  |  |  |  |  |
Number of Shares |  |  |  |  |  |  |  |  |
Number of shares vested |  |  |  |  | 320,980 |  | 320,980 |  |
Weighted Average Fair Value |  |  |  |  |  |  |  |  |
Vested (in dollars per share) |  |  |  |  |  |  | $ 11.59 |  |
Other Individuals |  |  |  |  |  |  |  |  |
Stock Awards |  |  |  |  |  |  |  |  |
Vesting period of awards |  |  |  |  |  |  | 3 years |  |

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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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