Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finite And Indefinite Lived Intangible Assets By Major Class [Line Items]
Total net amortized intangible assets	$ 1,685	$ 1,945
Amortization	(245)	(260)
Total net amortized intangible assets	1,440	1,685
Total net intangible assets	4,122	4,382
Total net intangible assets	3,877	4,122
NLEX [Member] | Trade Name [Member]
Finite And Indefinite Lived Intangible Assets By Major Class [Line Items]
Unamortized intangible assets	$ 2,437	$ 2,437	$ 2,437
Customer Network [Member] | HGP [Member]
Finite And Indefinite Lived Intangible Assets By Major Class [Line Items]
Finite-Lived intangible asset, useful life	12 years	12 years
Finite-Lived intangible assets, remaining amortization period	6 years 2 months 12 days	7 years 2 months 12 days
Total net amortized intangible assets	$ 158	$ 178
Amortization	(22)	(20)
Total net amortized intangible assets	$ 136	$ 158
HGP Trade Name [Member]
Finite And Indefinite Lived Intangible Assets By Major Class [Line Items]
Finite-Lived intangible asset, useful life	14 years	14 years
Finite-Lived intangible assets, remaining amortization period	8 years 2 months 12 days	9 years 2 months 12 days
Total net amortized intangible assets	$ 953	$ 1,059
Amortization	(103)	(106)
Total net amortized intangible assets	$ 850	$ 953
Customer Relationships [Member] | NLEX [Member]
Finite And Indefinite Lived Intangible Assets By Major Class [Line Items]
Finite-Lived intangible asset, useful life	7 years 7 months 6 days	7 years 7 months 6 days
Finite-Lived intangible assets, remaining amortization period	4 years 1 month 6 days	5 years 1 month 6 days
Total net amortized intangible assets	$ 550	$ 660
Amortization	(110)	(110)
Total net amortized intangible assets	$ 440	$ 550
NLEX's Website [Member] | NLEX [Member]
Finite And Indefinite Lived Intangible Assets By Major Class [Line Items]
Finite-Lived intangible asset, useful life	5 years	5 years
Finite-Lived intangible assets, remaining amortization period	1 year 4 months 24 days	2 years 4 months 24 days
Total net amortized intangible assets	$ 24	$ 33
Amortization	(10)	(9)
Total net amortized intangible assets	$ 14	$ 24
Noncompete Agreements | NLEX [Member]
Finite And Indefinite Lived Intangible Assets By Major Class [Line Items]
Finite-Lived intangible asset, useful life		2 years
Finite-Lived intangible assets, remaining amortization period		0 years
Total net amortized intangible assets		$ 15
Amortization		$ (15)