Foreign Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues by geographic area	$ 3,756	$ 3,935
Operating income (loss) by geographic area	(18,402)	(15,030)
Net income (loss) by geographic area	(24,561)	(35,030)
Identifiable assets by geographic area	12,178	27,691
Long lived assets by geographic area	6,401	9,931
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues by geographic area	3,737	3,795
Operating income (loss) by geographic area	(16,956)	(13,210)
Net income (loss) by geographic area	(23,111)	(33,174)
Identifiable assets by geographic area	11,872	27,189
Long lived assets by geographic area	6,233	9,599
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues by geographic area	19	140
Operating income (loss) by geographic area	(1,509)	(1,820)
Net income (loss) by geographic area	(1,513)	(1,821)
Identifiable assets by geographic area	187	432
Long lived assets by geographic area	140	318
Saudi Arabia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues by geographic area
Operating income (loss) by geographic area
Net income (loss) by geographic area		(35)
Identifiable assets by geographic area		23
Long lived assets by geographic area
India [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues by geographic area	301
Operating income (loss) by geographic area	63
Net income (loss) by geographic area	63
Identifiable assets by geographic area	119	47
Long lived assets by geographic area	28	14
Eliminations [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues by geographic area	(301)
Operating income (loss) by geographic area
Net income (loss) by geographic area
Identifiable assets by geographic area
Long lived assets by geographic area