LONG-TERM DEBT (Details) $ in Thousands			3 Months Ended	12 Months Ended
		Mar. 06, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($) Property	Jul. 11, 2018 USD ($)	Dec. 31, 2017 USD ($)
Long term debt and lease obligations [Abstract]
Deferred financing fees				$ (532)		$ (807)
Long term debt				48,769		52,593
Less current maturities				(15,000)		0
Long-term debt, excluding current maturities				$ 33,769		52,593
Number of properties owned | Property				4
Letters of credit outstanding				$ 1,800		7,200
Scheduled maturities of long-term debt [Abstract]
2019	[1]			15,000
2020				33,769
2021				0
2022				0
2023				0
Thereafter				0
Long term debt				48,769
Deferred finance fees				$ 500
Colorado, Tennessee and Texas Properties [Member]
Long term debt and lease obligations [Abstract]
Number of properties owned | Property				3
Connecticut [Member]
Long term debt and lease obligations [Abstract]
Number of properties owned | Property				1
Subsequent Event [Member] | Prime Rate [Member]
Long term debt and lease obligations [Abstract]
Interest rate on credit facility		6.50%
Letter of Credit [Member]
Long term debt and lease obligations [Abstract]
Percentage of letter of credit fee, quarterly installment				1.75%
Letters of credit outstanding				$ 6,200
Maximum availability under the facility previously provided				9,500
Letter of Credit [Member] | Plan [Member]
Long term debt and lease obligations [Abstract]
Increase in credit facility			$ 2,800
Increase in restricted cash			$ 2,800
Letter of Credit [Member] | Subsequent Event [Member]
Long term debt and lease obligations [Abstract]
Percentage of unused facility fee payable quarterly		1.25%
Credit Agreement [Member]
Long term debt and lease obligations [Abstract]
Long-term line of credit				49,301		$ 53,400
Line of credit facility, remaining borrowing capacity				$ 22,700
Percentage of letters of credit margin against available funds in cash collateral				100.00%
Minimum quarterly average aggregate balances to be maintained				$ 5,000
Bank fees if minimum quarterly average aggregate balances is not maintained				12,500
Modification fees paid to bank				50,000
Revolving Credit Facility 1 [Member]
Long term debt and lease obligations [Abstract]
Line of credit facility, maximum borrowing capacity					$ 25,000
Line of credit facility, remaining borrowing capacity				$ 22,700
Expiration date of credit facility				Mar. 31, 2024
Percentage of net proceeds of sale used to pay down principal amount				25.00%
Scheduled maturities of long-term debt [Abstract]
2019				$ 200
2020				600
2021				400
2022				400
2023				$ 400
Revolving Credit Facility 1 [Member] | Subsequent Event [Member]
Long term debt and lease obligations [Abstract]
Credit facility drew down amount		$ 25,000
Revolving Credit Facility 2 [Member]
Long term debt and lease obligations [Abstract]
Line of credit facility, maximum borrowing capacity					25,000
Revolving Credit Facility 2 [Member] | Prime Rate [Member]
Long term debt and lease obligations [Abstract]
Interest rate on credit facility				3.50%
Revolving Credit Facility 2 [Member] | Subsequent Event [Member]
Long term debt and lease obligations [Abstract]
Line of credit facility, remaining borrowing capacity		2,500
Line of credit facility, additional borrowing capacity		$ 2,500
Revolving Credit Facility 2 [Member] | Subsequent Event [Member] | Prime Rate [Member]
Long term debt and lease obligations [Abstract]
Percentage of unused facility fee payable quarterly		0.50%
Revolving Credit Facility 2 [Member] | Letter of Credit [Member]
Long term debt and lease obligations [Abstract]
Line of credit facility, maximum borrowing capacity					10,000
Revolving Credit Facility 3 [Member]
Long term debt and lease obligations [Abstract]
Line of credit facility, maximum borrowing capacity					$ 15,000
Expiration date of credit facility				May 31, 2019
Revolving Credit Facility 3 [Member] | Prime Rate [Member]
Long term debt and lease obligations [Abstract]
Interest rate on credit facility				3.50%
Minimum [Member] | Revolving Credit Facility 2 [Member]
Long term debt and lease obligations [Abstract]
Expiration date of credit facility				May 31, 2020
Maximum [Member] | Revolving Credit Facility 2 [Member]
Long term debt and lease obligations [Abstract]
Expiration date of credit facility				Apr. 30, 2020
Tranche A [Member] | Credit Agreement [Member]
Long term debt and lease obligations [Abstract]
Long-term line of credit				$ 25,000
Tranche A [Member] | Revolving Credit Facility 1 [Member] | Prime Rate [Member]
Long term debt and lease obligations [Abstract]
Interest rate on credit facility				2.85%
Tranche A [Member] | Revolving Credit Facility 2 [Member]
Long term debt and lease obligations [Abstract]
Number of days for bank to receive financial statements after fiscal period				15 days
Tranche A [Member] | Revolving Credit Facility 2 [Member] | Prime Rate [Member]
Long term debt and lease obligations [Abstract]
Interest rate on credit facility				2.85%
Tranche A [Member] | Revolving Credit Facility 2 [Member] | Subsequent Event [Member]
Long term debt and lease obligations [Abstract]
Line of credit facility, remaining borrowing capacity		$ 1,250
Tranche A [Member] | Revolving Credit Facility 3 [Member] | Prime Rate [Member]
Long term debt and lease obligations [Abstract]
Interest rate on credit facility				2.85%
Tranche B [Member] | Revolving Credit Facility 1 [Member] | Prime Rate [Member]
Long term debt and lease obligations [Abstract]
Interest rate on credit facility				6.00%
Tranche B [Member] | Revolving Credit Facility 2 [Member]
Long term debt and lease obligations [Abstract]
Number of days for bank to receive financial statements after fiscal period				15 days
Tranche B [Member] | Revolving Credit Facility 2 [Member] | Prime Rate [Member]
Long term debt and lease obligations [Abstract]
Interest rate on credit facility				6.00%
Tranche B [Member] | Revolving Credit Facility 2 [Member] | Subsequent Event [Member]
Long term debt and lease obligations [Abstract]
Line of credit facility, remaining borrowing capacity		$ 1,250
Tranche B [Member] | Revolving Credit Facility 3 [Member] | Prime Rate [Member]
Long term debt and lease obligations [Abstract]
Interest rate on credit facility				6.00%

[1] Includes deferred finance fees of $0.5 million.