FINANCE RECEIVABLES - Sale of Finance Receivables (Details) - USD ($) $ in Thousands	1 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended
Dec. 31, 2017	Dec. 31, 2017	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Receivables [Abstract]
Cash proceeds from sale of finance receivables					$ 2,300
Proceeds from collateralized borrowing from the transfer of finance receivables	$ 1,100	$ 1,075	$ 1,075	$ 0	$ 1,075	$ 0

Amount, before counterparty netting, of cash proceeds received in transfers of derecognized financial assets from transactions which comprise an initial transfer and an agreement entered into in contemplation of the initial transfer resulting in retention of substantially all of the exposure to the economic return throughout the term of the transaction.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4D
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118948506&loc=SL51823488-111719

Name:	us-gaap_TransferOfFinancialAssetsAccountedForAsSalesCashProceedsReceivedForAssetsDerecognizedAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant