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Note 11 - Accounts Payable and Accrued Expenses (Tables)
9 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
   
December 31, 2020
   
March 31, 2020
 
Accounts payable   $
3,664
    $
10,045
 
Accrued inventories in-transit    
1,131
     
763
 
Accrued other miscellaneous expenses    
2,397
     
1,986
 
Advanced deposits    
1,417
     
666
 
Accrued compensation    
5,751
     
5,683
 
Income taxes payable    
635
     
933
 
Accrued product warranty    
2,020
     
2,015
 
Total
  $
17,015
    $
22,091
 
Schedule of Product Warranty Liability [Table Text Block]
   
Three Months Ended December 31,
   
Nine Months Ended December 31,
 
   
2020
   
2019
   
2020
   
2019
 
Balance at beginning of period   $
2,109
    $
1,641
    $
2,015
    $
1,545
 
Acquired warranty obligations    
147
     
     
147
     
 
Change in accruals for warranties during the period    
124
     
93
     
507
     
247
 
Settlements during the period    
(360
)    
(28
)    
(649
)    
(86
)
Balance at end of period
  $
2,020
    $
1,706
    $
2,020
    $
1,706