RELATED PARTY TRANSACTIONS (Details) $ in Thousands				1 Months Ended	3 Months Ended
	Aug. 28, 2015 USD ($) ft² a item	Aug. 15, 2015 item	Sep. 30, 2004 USD ($)	Sep. 30, 2004 USD ($)	Mar. 31, 2018 USD ($) ft²	Mar. 31, 2017 USD ($)	Nov. 17, 2017 USD ($)
BLI Driveway Lease
RELATED PARTY TRANSACTIONS
Operating expenses related to lease			$ 1,350
Biggest Little Investments, L.P. | BLI Parking Lot Lease
RELATED PARTY TRANSACTIONS
Number of parking spaces | item	300
Minimum annual rent							$ 695
Anniversary years subject to cost of living adjustment rent increases	5 years
Lease renewal option additional term	10 years
Amount due to related party if lease is not renewed	$ 1,600
Operating expenses related to lease					$ 8	$ 7
Lease rent paid					$ 174	174
Biggest Little Investments, L.P. | BLI Driveway Lease
RELATED PARTY TRANSACTIONS
Lease term				15 years
Area of property | ft²					37,400
Minimum annual rent			300	$ 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
Operating expenses related to lease			$ 2,000		$ 5	7
Cost of improvements, useful life			15 years
Lease rent paid					94	94
Affiliates | Leases for billboard advertising, storage space and parking lot space
RELATED PARTY TRANSACTIONS
Lease rent paid					$ 32	$ 27
Golden Road | Biggest Little Investments, L.P. | BLI Parking Lot Lease
RELATED PARTY TRANSACTIONS
Lease term	20 years
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