SHARE-BASED COMPENSATION EXPENSE - Additional Information (Detail) - USD ($)
shares in Thousands |
1 Months Ended |
12 Months Ended |
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Jan. 31, 2018 |
Dec. 31, 2017 |
Jan. 31, 2017 |
Jan. 31, 2016 |
Dec. 31, 2017 |
Nov. 30, 2017 |
Dec. 31, 2016 |
May 31, 2014 |
| Employee Benefit Plans Disclosure [Line Items] |
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| Unrecognized compensation cost on unvested option awards outstanding |
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$ 100,000
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$ 100,000
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| Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Grants In Period |
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185
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value |
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0
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$ 0
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| Employee Stock Option [Member] |
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| Employee Benefit Plans Disclosure [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period |
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1
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| 2005 Restricted Stock Unit Award Plan [Member] | Director [Member] |
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| Employee Benefit Plans Disclosure [Line Items] |
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| Deferred Compensation Arrangement with Individual, Recorded Liability |
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$ 41,000
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$ 41,000
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$ 27,000
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| Share Based Compensation, Non Employee Services Transaction,Cash Settlement, Percentage |
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40.00%
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| 2014 Restricted Stock Unit Award Plan [Member] |
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| Employee Benefit Plans Disclosure [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant |
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400
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period |
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1
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1
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| Share Based Compensation Arrangement Share Based Payment Shares Reserved For Future Distribution |
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66
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42
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| Share-based Compensation Arrangement by Share-based Payment Award, Shares Purchased for Award |
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3
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| 2014 Restricted Stock Unit Award Plan [Member] | Settled In Cash [Member] |
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| Employee Benefit Plans Disclosure [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period |
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22
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9
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18
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| 2014 Restricted Stock Unit Award Plan [Member] | Distributed In Common Stock [Member] |
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| Employee Benefit Plans Disclosure [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period |
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67
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42
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| 2014 Restricted Stock Unit Award Plan [Member] | Convertible Common Stock [Member] |
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| Employee Benefit Plans Disclosure [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period |
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49
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33
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| 2014 Restricted Stock Unit Award Plan [Member] | Four Non Employee Directors [Member] |
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| Employee Benefit Plans Disclosure [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |
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60
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22
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| Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage |
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25.00%
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25.00%
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| Share-based Compensation Arrangement by Share-based Payment Award, Description |
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stock, for up to 40%
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stock, for up to 40%
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| Share Based Compensation Arrangement Share Based Payment Shares Reserved For Future Distribution |
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2
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| Deferred Compensation Arrangement with Individual, Recorded Liability |
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$ 27,000
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| 2014 Restricted Stock Unit Award Plan [Member] | Subsequent Event [Member] | Settled In Cash [Member] |
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| Employee Benefit Plans Disclosure [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period |
24
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| 2014 Restricted Stock Unit Award Plan [Member] | Subsequent Event [Member] | Distributed In Common Stock [Member] |
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| Employee Benefit Plans Disclosure [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period |
261
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| 2014 Restricted Stock Unit Award Plan [Member] | Subsequent Event [Member] | Convertible Common Stock [Member] |
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| Employee Benefit Plans Disclosure [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period |
238
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| 2017 Restricted Stock Unit Award Plan [Mfember] |
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| Employee Benefit Plans Disclosure [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant |
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1,300
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1,300
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| Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage |
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100.00%
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| Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized |
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1,500
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| Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Grants In Period |
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200
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| 2017 Restricted Stock Unit Award Plan [Mfember] | Subsequent Event [Member] |
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| Employee Benefit Plans Disclosure [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage |
25.00%
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| Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Grants In Period |
67
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