Related Party Transactions (Details 3) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Related Party Transaction [Line Items]
Net and comprehensive (income) loss	$ 48	$ (3,646)
Subsidiaries [Member]
Related Party Transaction [Line Items]
Net and comprehensive (income) loss	95	(7,294)
Gauss LLC [Member]
Related Party Transaction [Line Items]
Net and comprehensive (income) loss	$ 48	$ (3,646)
Non-controlling interest percentage	50.00%
GQM LLC [Member]
Related Party Transaction [Line Items]
Non-controlling interest percentage	50.00%	50.00%
Permanent Non-controlling Interest [Member] | Gauss LLC [Member]
Related Party Transaction [Line Items]
Net and comprehensive (income) loss	$ 29	$ (2,188)
Temporary Non-controlling Interest [Member] | Gauss LLC [Member]
Related Party Transaction [Line Items]
Net and comprehensive (income) loss	$ 19	$ (1,458)