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OTHER FINANCIAL STATEMENT DATA - Schedule of Intangible Asset Amortization Expenses (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Jun. 30, 2019
Future estimated amortization expense related to amortizable intangible assets    
2021 $ 467  
2022 438  
2023 425  
2024 363  
2025 366  
Thereafter 2,520  
Total $ 4,579 $ 8,761