Subsequent Events (Details) ft² in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2018 USD ($)	Apr. 27, 2018 ft² a
Subsequent Event [Line Items]
Estimated cost for facility expansion	$ 860,000	$ 674,000
NORTH CAROLINA | Subsequent event
Subsequent Event [Line Items]
Number of acres owned | a				46
Area of manufacturing plant | ft²				15
Forecast | NORTH CAROLINA
Subsequent Event [Line Items]
Estimated cost for facility expansion			$ 3,300,000