INCOME TAXES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Current [Abstract]
Federal	$ 0	$ 0
State	802	115
Total	802	115
Deferred [Abstract]
Federal	(21,743)	120
State	(14,118)	33
Total	(35,861)	153
Total (benefit) provision	(35,059)	268
Effective income tax rate reconciliation, amount [Abstract]
Income before taxes	13,506	2,283
Expected tax	2,836	479
State tax benefit (net of federal)	(10,513)	148
Valuation allowance	(27,420)	(428)
Other	38	69
Total (benefit) provision	$ (35,059)	$ 268
Effective income tax rate reconciliation, percent [Abstract]
Federal corporate tax rate	21.00%	21.00%
State tax benefit (net of federal)	(77.80%)	6.50%
Valuation allowance	(203.00%)	(18.80%)
Other	0.20%	3.00%
Total	(259.60%)	11.70%
Gross noncurrent deferred tax assets (liabilities) [Abstract]
Allowance for bad debts	$ 7,659	$ 5,461
Accrued benefits	1,208	0
Stock-based compensation	317	178
Lease liability	16,369	14,822
Right-of-use asset	(14,759)	(13,156)
Depreciation	11,298	10,981
Goodwill	(1,091)	(766)
Other intangibles	100	135
Pension plan liabilities	1,137	1,286
Net operating loss carryforwards	13,480	18,261
Gross noncurrent deferred tax assets, net	35,718	37,202
Less valuation allowance	0	(37,355)
Noncurrent deferred tax (liabilities) assets, net	35,718
Noncurrent deferred tax assets (liabilities), net		$ (153)
Net operating loss carryforwards	43,100
Net operating loss carryforwards, subject to expiration	$ 29,300
Net operating loss carryforwards, period of ownership change	3 years
Net operating loss carryforwards, minimum percentage of ownership change	50.00%