Quarterly report pursuant to Section 13 or 15(d)

Property, Plant and Equipment (Details)

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Property, Plant and Equipment (Details)
1 Months Ended 3 Months Ended 9 Months Ended
Aug. 31, 2018
USD ($)
a
Jun. 30, 2018
USD ($)
ft²
Sep. 30, 2018
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Property, Plant and Equipment [Line Items]          
Proceeds from sale of property, plant and equipment       $ 5,072,000 $ 522,000
Gain on sale of property       4,000,000 $ 0
Provo, Utah          
Property, Plant and Equipment [Line Items]          
Number of acres | a 8        
Impairment of long-lived assets held-for-use     $ 1,700,000 1,700,000  
Proceeds from sale of property, plant and equipment $ 2,700,000        
Mexico City, Mexico          
Property, Plant and Equipment [Line Items]          
Number of square feet | ft²   29,300      
Proceeds from sale of property, plant and equipment   $ 2,600,000      
Gain on sale of property     $ 0 $ 2,300,000