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LEASES, Lease Assets, Liabilities and Lease Cost (Details) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2020 USD ($) Lease | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Jan. 02, 2019 USD ($)
Leases [Abstract] |  |  |  |  |
Operating lease assets |  | $ 11,772,000 | $ 11,772,000 | $ 13,897,000 |
Operating lease liabilities |  | $ 12,775,000 | 12,775,000 |  |
Number of finance leases executed | Lease |  | 2 |  |  |
Assets [Abstract] |  |  |  |  |
Operating lease assets |  | $ 11,772,000 | 11,772,000 | 13,897,000 |
Financing lease assets |  | 44,000 | 44,000 | 0 |
Total assets |  | 11,816,000 | 11,816,000 | 13,897,000 |
Current [Abstract] |  |  |  |  |
Operating lease liabilities |  | 3,530,000 | 3,530,000 | 3,823,000 |
Current maturities of financing lease obligations |  | 14,000 | 14,000 | 0 |
Noncurrent [Abstract] |  |  |  |  |
Operating lease liabilities, non-current |  | 9,245,000 | 9,245,000 | 10,655,000 |
Financing lease liabilities, net of current obligation |  | 29,000 | 29,000 | 0 |
Total lease liabilities |  | 12,818,000 | 12,818,000 | 14,478,000 |
Lease Cost [Abstract] |  |  |  |  |
Operating lease asset impairment expense |  |  | 600,000 |  |
Finance [Abstract] |  |  |  |  |
Total lease cost |  |  | 5,347,000 | 5,050,000 |
Finance lease costs |  |  |  | 0 |
Maximum [Member] |  |  |  |  |
Assets [Abstract] |  |  |  |  |
Financing lease assets |  | $ 100,000 | 100,000 |  |
Finance [Abstract] |  |  |  |  |
Finance lease costs |  |  | 1,000 |  |
ASU 2016-02 [Member] |  |  |  |  |
Leases [Abstract] |  |  |  |  |
Operating lease assets |  |  |  |  | $ 17,600,000
Operating lease liabilities |  |  |  |  | 18,100,000
Pre-tax cumulative effect adjustment to retained earnings |  |  |  |  | 500,000
Assets [Abstract] |  |  |  |  |
Operating lease assets |  |  |  |  | $ 17,600,000
ASU 2016-02 [Member] | Maximum [Member] |  |  |  |  |
Lease Cost [Abstract] |  |  |  |  |
Operating lease asset impairment expense |  |  |  | 100,000 |
Operating Expenses [Member] |  |  |  |  |
Lease Cost [Abstract] |  |  |  |  |
Operating lease cost |  |  | 3,809,000 | 4,151,000 |
Variable lease cost | [1] |  | 937,000 | 895,000 |
Finance [Abstract] |  |  |  |  |
Amortization of lease assets | [2] |  | 0 | 0 |
Impairment Expense [Member] |  |  |  |  |
Lease Cost [Abstract] |  |  |  |  |
Operating lease cost |  |  | 601,000 | 4,000 |
Interest Expense [Member] |  |  |  |  |
Finance [Abstract] |  |  |  |  |
Interest on lease liabilities | [2] |  | $ 0 | $ 0 |
[1] | Variable lease cost includes payments for certain real estate taxes, insurance, common area maintenance, and other charges related to lease agreements, which are not included in the measurement of the operating lease liabilities.
[2] | Finance lease costs are less than $1,000 for December 31, 2020; we had no finance lease costs in 2019.

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