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Commitments and Contingencies (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Restricted Cash and Cash Equivalents | $ 0 |  |  |  | $ 11,512,000 |  |  |  | $ 0 | $ 11,512,000 |
Rent expense |  |  |  |  |  |  |  |  | 1,392,000 | 1,795,000 | $ 1,926,000
Other | 1,200,000 | $ 0 | $ 0 | $ 0 | 0 | $ 0 | $ (1,242,000) | $ 1,742,000 | 1,200,000 | 500,000 | $ 4,141,000
Cash and other assets, IP Fund | 986,000 |  |  |  | 1,118,000 |  |  |  | 986,000 | 1,118,000 |
Investments, IP Fund | 1,905,000 |  |  |  | 2,933,000 |  |  |  | 1,905,000 | 2,933,000 |
Total assets, IP Fund | 2,891,000 |  |  |  | 4,051,000 |  |  |  | 2,891,000 | 4,051,000 |
Accrued expenses and contributions, IP Fund | 2,567,000 |  |  |  | 2,394,000 |  |  |  | 2,567,000 | 2,394,000 |
Net assets, IP Fund | 324,000 |  |  |  | $ 1,657,000 |  |  |  | 324,000 | 1,657,000 |
Revenues, IP Fund |  |  |  |  |  |  |  |  | 0 | 16,000 |
IP Fund, Operating expenses |  |  |  |  |  |  |  |  | 390,000 | 572,000 |
IP Fund, Gain from Operations |  |  |  |  |  |  |  |  | (390,000) | (556,000) |
IP Fund, Net Loss in Equity Method Investment |  |  |  |  |  |  |  |  | (943,000) | (1,013,000) |
IP Fund, Net Loss |  |  |  |  |  |  |  |  | (1,333,000) | $ (1,569,000) |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, Estimate of Possible Loss | 1,200,000 |  |  |  |  |  |  |  | 1,200,000 |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, Estimate of Possible Loss | $ 3,000,000 |  |  |  |  |  |  |  | $ 3,000,000 |  |

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- Definition Cash and other assets, IP Fund + References No definition available. + Details
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- Definition IP Fund, Gain from Operations + References No definition available. + Details
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