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FINANCE RECEIVABLES - Information Regarding Finance Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019
Receivables [Abstract]
Current finance receivables, net	$ 7,196		$ 7,468
Finance receivables due after one year, net	10,296		11,213
Total finance receivables	17,492		18,681
Finance receivable, allowance	$ 909	$ 559	$ 150	$ 602	$ 607	$ 606