Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Summary Of Significant Accounting Policies [Line Items]
Accumulated deficit	$ (280,889,000)	$ (280,875,000)	$ (280,889,000)
Working capital deficit		4,100,000
Real estate inventory write-down		0	2,748,000
Impairment charges			2,749,000
Goodwill impairment charges		$ 0	2,688,000
Additional earn-out period		1 year
Selling, General and Administrative Expenses [Member]
Summary Of Significant Accounting Policies [Line Items]
Advertising and promotion expense		$ 400,000	400,000
HGP [Member]
Summary Of Significant Accounting Policies [Line Items]
Goodwill impairment charges	$ 2,700,000		2,688,000
NLEX [Member]
Summary Of Significant Accounting Policies [Line Items]
Additional earn-out period		1 year
Additional earn-out liability		$ 1,000,000
Customer Network [Member] | HGP [Member]
Summary Of Significant Accounting Policies [Line Items]
Impairment charges		$ 0	$ 2,700,000