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Schedule of Lease Amounts Paid to Related Parties (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Related Party Transaction [Line Items] |  |
Amount Charged on Leased Premises | $ 100 | $ 175
Lease Amounts [Member] | Foster City, CA [Member] | Senior Officers of HGI [Member] |  |
Related Party Transaction [Line Items] |  |
Amount Charged on Leased Premises | 0 | 76
Lease Amounts [Member] | Edwardsville, IL [Member] | Senior Officer of NLEX [Member] |  |
Related Party Transaction [Line Items] |  |
Amount Charged on Leased Premises | $ 100 | $ 99

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- Definition Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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