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ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - New Accounting Standards (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Jan. 01, 2019
--- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Operating lease, right-of-use asset | $ 6,900 |
Present value of lease liabilities | 5,095 |
Operating lease current liability | 300 |
Operating lease noncurrent liability | $ 4,800 |
Accounting Standards Update 2016-02 |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Operating lease, right-of-use asset |  | $ 7,200
Present value of lease liabilities |  | 5,300
Off-Market Favorable Lease | Accounting Standards Update 2016-02 |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Operating lease, right-of-use asset |  | $ 1,900

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