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STOCK-BASED COMPENSATION - Narrative (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($) director shares	Sep. 30, 2017 USD ($) shares	May 31, 2017 shares	Jun. 30, 2016 shares	May 31, 2016 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of new directors who received options \| director	2
Share-based compensation expense \| $	$ 947	$ 766
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant of restricted common stock (shares)	90,000	88,000
Restricted Stock \| First anniversary of grant date
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage of awards	33.00%
Restricted Stock \| Second anniversary of grant date
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage of awards	33.00%
Restricted Stock \| Third anniversary of grant date
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage of awards	33.00%
Stock Options and Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payment award, expiration period	10 years
Stock Options and Stock Appreciation Rights (SARs) \| First anniversary of grant date
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage of awards	33.00%
Stock Options and Stock Appreciation Rights (SARs) \| Second anniversary of grant date
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage of awards	33.00%
Stock Options and Stock Appreciation Rights (SARs) \| Third anniversary of grant date
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage of awards	33.00%
Executive Equity Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense \| $	$ 259
2008 Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of quoted market price offering rate	85.00%
Restriction period	2 years
Shares authorized under the plan (shares)				350,000	150,000
2010 Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance (shares)		680,000	380,000
Director \| Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage of awards	33.33%
Stock options granted (in shares)	30,000
Director \| Stock Option \| First anniversary of grant date
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage of awards	33.33%
Director \| Stock Option \| Second anniversary of grant date
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage of awards	33.33%