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Income Taxes (Detail Textuals) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 27, 2020
Dec. 31, 2017
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2021
Mar. 31, 2020
Schedule Of Income Taxes [Line Items]                        
Income tax benefit     $ (884) $ (1,190) $ (92) $ (429) $ 1,746 $ (229) $ (92) $ (206) $ (2,595) $ 1,219
Federal income tax rate 21.00% 35.00%                    
NOL’s expiration date                     Mar. 31, 2039  
Undistributed earnings     $ 152,500               $ 152,500  
"CARES Act"                        
Schedule Of Income Taxes [Line Items]                        
Increase in effective tax rate                     23.70% (54.30%)
"CARES Act" | Fiscal Year 2019 Net Operating Losses                        
Schedule Of Income Taxes [Line Items]                        
Net operating losses carryback $ 9,700                      
Income tax refund 3,500                      
Income tax benefit 1,400                      
"CARES Act" | Fiscal Year 2020 Net Operating Losses                        
Schedule Of Income Taxes [Line Items]                        
Net operating losses carryback 3,000                      
Income tax refund 1,000                      
Income tax benefit $ 400