SHAREHOLDERS EQUITY - Stock based compensation - Financial Performance Units (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020
Financial Performance Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	41,743
Financial Performance Units \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Financial performance threshold percentage	150.00%
Financial Performance Units \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Financial performance threshold percentage	0.00%
Financial Performance Units Granted Prior to May 1, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares can be issued	9,198
Unrecognized compensation expense	$ 18
Unrecognized compensation expense recognition period (in years)	3 months 18 days
Stock-based compensation expense	$ 23	$ 49
Financial Performance Units Granted Prior to May 1, 2019 \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target threshold of awards	100.00%
Financial Performance Units Granted Prior to May 1, 2019 \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target threshold of awards	50.00%
Financial Performance Units Granted From May 1, 2019 Through April 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of awards accruing at maximum threshold	150.00%
Maximum number of shares can be issued	80,255
Unrecognized compensation expense	$ 372
Unrecognized compensation expense recognition period (in years)	2 years 3 months 18 days
Granted (in shares)		1,866
Stock-based compensation expense	$ 154	$ 246
Financial Performance Units Granted From May 01, 2020 Through December 31 2020, Excluding November 18, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of awards accruing at maximum threshold	150.00%
Remainder threshold awards	50.00%
Maximum number of shares can be issued	81,516
Unrecognized compensation expense	$ 474
Unrecognized compensation expense recognition period (in years)	3 years 3 months 18 days
Granted (in shares)		58,993
Stock-based compensation expense	$ 153	$ 97
Financial Performance Units Granted on November 18, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of awards accruing at maximum threshold	150.00%
Maximum number of shares can be issued	34,752
Unrecognized compensation expense	$ 346
Unrecognized compensation expense recognition period (in years)	3 years 1 month 6 days
Stock-based compensation expense	$ 94
Financial Performance Units Granted From May 3 2021 Through August 11,2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of awards accruing at maximum threshold	150.00%
Maximum number of shares can be issued	61,118
Unrecognized compensation expense	$ 970
Unrecognized compensation expense recognition period (in years)	4 years 3 months 18 days
Granted (in shares)	41,743
Stock-based compensation expense	$ 140

The maximum percentage of threshold for accruing awards.

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The percentage of threshold stated for achieving entity's financial performance metrics.

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Percent Of Awards Accruing At Maximum Threshold

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The percentage of threshold for remaining awards.

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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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).

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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