Quarterly report pursuant to Section 13 or 15(d)

Other Expenses - Additional Information (Detail)

v3.20.2
Other Expenses - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Jun. 24, 2019
Mar. 31, 2020
Jun. 30, 2019
Other Expenses [Line Items]      
Proceeds from sale of subsidiary     $ 602
Loss on sale of Energy Steel & Supply Co.     $ 87
Westinghouse Electric Company [Member]      
Other Expenses [Line Items]      
Bad debt charge   $ 98  
Inventory write down   338  
Energy Steel [Member]      
Other Expenses [Line Items]      
Proceeds from sale of subsidiary $ 602    
Loss on sale of Energy Steel & Supply Co.   $ 87