Inventory (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Inventory write-down	$ 200,000	$ 200,000
Inventory	$ 7,608,000	$ 7,608,000	$ 0