Quarterly report pursuant to Section 13 or 15(d)

Accounting and Reporting Changes - Additional Information (Detail)

v3.19.2
Accounting and Reporting Changes - Additional Information (Detail) - USD ($)
$ in Thousands
Apr. 01, 2019
Jun. 30, 2019
Jun. 24, 2019
Mar. 31, 2019
Jun. 30, 2018
Mar. 31, 2018
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]            
Right-of-use assets   $ 271        
Lease liabilities   266        
Retained earnings   $ 92,861   $ 93,847 $ 99,427 $ 99,011
Topic 842 [Member]            
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]            
Right-of-use assets $ 676          
Lease liabilities 732          
Retained earnings 80          
Decrease in other current assets 47          
Decrease in deferred income tax liability $ 20          
Topic 842 [Member] | Held for Sale [Member]            
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]            
Right-of-use assets       500    
Lease liabilities       $ 500    
Topic 842 [Member] | Subsequently Sold [Member]            
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]            
Right-of-use assets     $ 500      
Lease liabilities     $ 500      
Topic 842 [Member] | Maximum [Member]            
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]            
Lease term 12 months