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Consolidated Statements of Cash Flows (Reconciliation) - USD ($)
Jun. 30, 2019
Dec. 31, 2018
Jun. 30, 2018
Dec. 31, 2017
Reconciliation of cash, cash equivalents, and restricted cash        
Cash and cash equivalents $ 13,192,000 $ 9,663,000 $ 15,424,000  
Restricted cash 700,000 800,000 800,000  
Cash, cash equivalents and restricted cash $ 13,892,000 $ 10,463,000 $ 16,224,000 $ 12,276,000