Discontinued Operations - Schedule of Financial Information (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
Revenues	$ 4,350	$ 8,659
Gross profit	2,447	3,525
Net income (loss)	(1,343)	(119)
GridSense Inc. [Member] \| Discontinued Operations [Member]
Revenues		212
Gross profit		28
Net income (loss)	38	(286)
Gain on deconsolidation	660
Income (loss) from discontinued operations, net of income taxes	$ 698	$ (286)

The amount of the gain (loss) recognized by the parent and included in its attributable portion of net income for the period due to deconsolidation of a subsidiary or derecognition of a group of assets. The gain (loss) recognized and included in the net income attributable to the parent for the period is generally computed as the difference between: (a) the aggregate of: (1) the fair value of any consideration received; (2) the fair value of any retained noncontrolling investment in the former subsidiary at the date the subsidiary was deconsolidated; and (3) the carrying amount of any noncontrolling interest in the former subsidiary (including any accumulated other comprehensive income attributable to the noncontrolling interest) at the date the subsidiary was deconsolidated and (b) the carrying amount of the former subsidiary's assets and liabilities.

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