Related Party Transactions (Narrative) (Details) - USD ($) $ in Thousands	4 Months Ended	12 Months Ended
	Dec. 31, 2003	Dec. 31, 2015	Dec. 31, 2014
Related Party Transaction [Line Items]
Debt Payable to Related Parties		$ 1,721	$ 2,985
Street Capital [Member]
Related Party Transaction [Line Items]
Related Party Debt, Interest rate	10.00%
Related Party Transaction, Description of Transaction		Beginning in 2004, HGI and Street Capital entered into successive annual management services agreements (collectively, the “Agreement”). Under the terms of the Agreement, HGI agreed to pay Street Capital for ongoing services provided to HGI by Street Capital personnel. These services included preparation of the Company’s financial statements and regulatory filings, taxation matters, stock-based compensation administration, Board administration, patent portfolio administration and litigation matters. The Street Capital employees providing the services were: 1) its Executive Vice President, Secretary and Chief Financial Officer, 2) its Tax Manager, 3) an Accounting Manager, and 4) its Accounts Payable Clerk. These employees had the same or similar positions with HGI, but none of them received compensation from HGI. Rather, Street Capital allocated to HGI a percentage, based on time incurred, of the employees’ base compensation paid by Street Capital. Beginning in 2011, additional amounts were charged to HGI for Street Capital services specifically relating to the ongoing operations of HGI’s asset liquidation business. The amounts due under the Agreement were payable within 30 days following the respective year end, subject to applicable restrictions. Any unpaid amounts bore interest at 10% per annum commencing on the day after such year end. In 2013, Street Capital announced its plan to dispose of its interest in HGI, and on March 20, 2014, Street Capital declared a dividend in kind, consisting of Street Capital’s distribution of its majority interest in HGI to Street Capital shareholders. The dividend was paid on April 30, 2014 to shareholders of record as of April 1, 2014. Following this disposition, the Company and Street Capital entered into a replacement management services agreement (the “Services Agreement”). Under the terms of the Services Agreement, Street Capital remained as external manager and continued to provide the same services, at similar rates, until the Services Agreement was terminated effective August 31, 2015, as described more fully in the Current Report on Form 8-K filed with the SEC on September 1, 2015.
Approximations [Member]
Related Party Transaction [Line Items]
Debt Payable to Related Parties		$ 1,700	$ 3,000
Related Party Accrued Interest		$ 400