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STATEMENTS OF CASH FLOWS Table 3 - Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Restricted Cash and Cash Equivalents Items [Line Items]        
Cash and cash equivalents $ 16,192 $ 11,529    
Cash, cash equivalents and restricted cash and Restricted Cash Equivalents 24,980 13,644 $ 24,292 $ 35,942
Cash and Cash Equivalents [Member]        
Restricted Cash and Cash Equivalents Items [Line Items]        
Cash and cash equivalents 16,192 11,529    
Other long-term assets, net        
Restricted Cash and Cash Equivalents Items [Line Items]        
Cash, cash equivalents and restricted cash and Restricted Cash Equivalents 8,788 0    
Assets Held for Sale [Member]        
Restricted Cash and Cash Equivalents Items [Line Items]        
Cash, cash equivalents and restricted cash and Restricted Cash Equivalents $ 0 $ 2,115