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SEGMENT INFORMATION (Details) - USD ($)
$ in Thousands
 3 Months Ended
Jun. 30, 2018
Jun. 24, 2017
Revenue:    
Revenue $ 36,658 $ 36,279
Gross Profit:    
Gross Profit 9,113 8,691
Operating Expenses:    
Operating Expenses 7,088 7,280
Operating Income:    
Operating Income 2,025 1,411
Unallocated Amounts:    
Interest and Other Expense, net 225 272
Provision for Income Taxes 372 283
Unallocated Amounts 597 555
Net Income 1,428 856
Service Segment [Member]    
Revenue:    
Revenue 19,325 18,482
Gross Profit:    
Gross Profit 4,919 4,636
Operating Expenses:    
Operating Expenses 3,851 [1] 3,751
Operating Income:    
Operating Income 1,068 [1] 885
Distribution [Member]    
Revenue:    
Revenue 17,333 17,797
Gross Profit:    
Gross Profit 4,194 4,055
Operating Expenses:    
Operating Expenses 3,237 [1] 3,529
Operating Income:    
Operating Income $ 957 [1] $ 526
[1] Operating expense allocations between segments were based on actual amounts, a percentage of revenues, headcount, and management's estimates.