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RELATED PARTY TRANSACTIONS (Details) $ in Thousands				3 Months Ended		9 Months Ended
	Nov. 17, 2015 USD ($)	Aug. 28, 2015 ft² a item	Sep. 30, 2004 USD ($)	Sep. 30, 2021 USD ($) ft²	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) ft²	Sep. 30, 2020 USD ($)
Biggest Little Investments, L.P. (BLI) | Parking Lot Lease
RELATED PARTY TRANSACTIONS
Rent paid				$ 174	$ 174	$ 522	$ 522
Operating expenses related to lease				13	13	21	20
Right of use asset					10,300		10,300
Operating lease liability				$ 10,300		$ 10,300
Biggest Little Investments, L.P. (BLI) | Driveway Lease
RELATED PARTY TRANSACTIONS
Lease term			15 years
Area of property | ft²				37,400		37,400
Minimum annual rent			$ 300
Anniversary years subject to cost of living adjustment rent increases			5 years
Number of terms for which the lease can be renewed | item		3
Lease renewal option additional term		5 years
Rent paid				$ 101	101	$ 303	303
Operating expenses related to lease				12	8	25	17
Right of use asset				3,800		3,800
Operating lease liability				3,800		3,800
Affiliates | Billboard advertising, storage space and parking lot space
RELATED PARTY TRANSACTIONS
Rent paid				$ 57	$ 27	$ 151	$ 101
Golden Road | Parking Lot Lease | Buildings
RELATED PARTY TRANSACTIONS
Area of land | a		4.2
Golden Road | Parking Lot Lease | Land
RELATED PARTY TRANSACTIONS
Number of parking spaces | item		300
Golden Road | Biggest Little Investments, L.P. (BLI) | Parking Lot Lease
RELATED PARTY TRANSACTIONS
Lease term		20 years
Minimum annual rent	$ 695
Anniversary years subject to cost of living adjustment rent increases	5 years
Lease renewal option additional term				10 years		10 years
Lessee, Operating Lease, Existence of Option to Extend [true false]						true
Amount due to related party if lease is not renewed				$ 1,600		$ 1,600
Golden Road | Biggest Little Investments, L.P. (BLI) | Parking Lot Lease | Buildings
RELATED PARTY TRANSACTIONS
Area of property | ft²		46,000
Area of land | a		4.2

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