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Discontinued Operations - Schedule of Financial Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Revenues	$ 8,659	$ 16,548
Gross profit	3,525	6,167
Net loss	(119)	(10,802)
GridSense [Member] | Discontinued Operations [Member]
Revenues	212	2,507
Gross profit	28	21
Net loss	$ (286)	(3,923)
U.S. Seismic Systems, Inc [Member] | Discontinued Operations [Member]
Revenues		163
Gross profit		(68)
Net loss		(772)
Loss on deconsolidation		(401)
Loss from discontinued operations, net of income taxes		$ (1,173)

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