Concentrations - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
International Locations
Concentrations (Textual)
Net assets located overseas	$ 28,944	$ 45,387
InvisibleShield Glass Products | Product Concentration Risk | Screen Protection Sales Revenue, Net
Concentrations (Textual)
Concentration risk, percentage	75.00%
InvisibleShield Glass Products | Product Concentration Risk | Sales Revenue, Net
Concentrations (Textual)
Concentration risk, percentage	33.00%
InvisibleShield Film products | Product Concentration Risk | Screen Protection Sales Revenue, Net
Concentrations (Textual)
Concentration risk, percentage	13.00%
InvisibleShield Film products | Product Concentration Risk | Sales Revenue, Net
Concentrations (Textual)
Concentration risk, percentage	6.00%
ISOD Film Blanks | Product Concentration Risk | Screen Protection Sales Revenue, Net
Concentrations (Textual)
Concentration risk, percentage	12.00%
ISOD Film Blanks | Product Concentration Risk | Sales Revenue, Net
Concentrations (Textual)
Concentration risk, percentage	5.00%