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STOCK BASED COMPENSATION - Restricted Stock Units (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Weighted Average Remaining Contractual Life |  |  |
Restricted stock units | 2 years 3 months 29 days |  |
Aggregate Intrinsic Value |  |  |
Restricted stock units | $ 1,158 |  |
Restricted Stock Units |  |  |
Restricted Stock Units |  |  |
Vesting period | 5 years |  |
Restricted Stock Units |  |  |
Restricted stock units at the beginning of the period (in shares) | 161,000 | 80,000 |
Awarded (in shares) | 10,000 | 81,000 |
Released (in shares) | 0 | 0 |
Forfeited (in shares) | (6,000) |  |
Restricted stock units at the end of the period (in shares) | 165,000 | 161,000 | 80,000
Weighted-Average Grant Date Fair Value |  |  |
Restricted stock units at the beginning of the period (in dollars per share) | $ 3.16 | $ 1.00 |
Awarded (in dollars per share) | 11.20 | 5.29 |
Forfeited (in dollars per share) | 6.00 |  |
Restricted stock units at the end of the period (in dollars per share) | 3.54 | $ 3.16 | $ 1.00
Weighted Average Remaining Contractual Life |  |  |
Restricted stock units |  | 3 years 3 months 18 days | 3 years 7 months 6 days
Aggregate Intrinsic Value |  |  |
Restricted stock units |  | $ 921 | $ 528
Stock price | $ 7.02 | $ 5.71 |
Vested (in shares) | 0 | 0 |
Restricted Stock Units | First installment |  |  |
Restricted Stock Units |  |  |
Vesting (as a percent) | 50.00% |  |
Restricted Stock Units | Second installment |  |  |
Restricted Stock Units |  |  |
Vesting (as a percent) | 50.00% |  |

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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(3) -URI http://asc.fasb.org/extlink&oid=6415400&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://www.xbrl.org/2003/role/presentationRef -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=6415400&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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