Restructuring Costs (Details Narrative) $ in Millions	6 Months Ended	12 Months Ended	18 Months Ended
	Jun. 30, 2019 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2014 position	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Entity number of employees				86
Lease Disposal Costs	$ 0.4
2017 Plan
Restructuring Cost and Reserve [Line Items]
Severance expense		$ 1.2
Restructuring Costs Under the 2013 Plan
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated, worldwide (over 100) | position			100