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 |