Income Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Loss Carryforwards [Line Items]
Increase (decrease) in valuation allowance									$ (2,000)	$ (36,000)	$ 6,000
Deferred tax assets, net	$ 0				$ 0				0	0
NOL carry forwards, federal	183,300								183,300
NOL carry forwards, state	112,000								112,000
NOL carry forwards, foreign	100,800								100,800
Undistributed earnings of foreign subsidiaries	4,200								4,200
Loss from continuing operations before provision for income taxes	2,411	$ 3,082	$ 1,987	$ 3,835	1,748	$ (109)	$ 1,048	$ 1,250	11,315	3,937	12,665
Income tax netted from Income from Discontinued Operations										1,311	$ 2,430
Israel Tax Authority
Operating Loss Carryforwards [Line Items]
Deferred tax assets, net					$ 2,600					$ 2,600
Federal
Operating Loss Carryforwards [Line Items]
NOL carry forwards increase (decrease)									800
State
Operating Loss Carryforwards [Line Items]
NOL carry forwards increase (decrease)									14,900
Foreign
Operating Loss Carryforwards [Line Items]
NOL carry forwards increase (decrease)									3,400
Tecnonet
Operating Loss Carryforwards [Line Items]
Provision for deferred taxes related to foreign earnings	$ 0								$ 0