SEGMENT AND GEOGRAPHIC DATA (Details) $ in Thousands		3 Months Ended								12 Months Ended
		Mar. 25, 2017 USD ($)	Dec. 24, 2016 USD ($)	Sep. 24, 2016 USD ($)	Jun. 25, 2016 USD ($)	Mar. 26, 2016 USD ($)	Dec. 26, 2015 USD ($)	Sep. 26, 2015 USD ($)	Jun. 27, 2015 USD ($)	Mar. 25, 2017 USD ($) item	Mar. 26, 2016 USD ($)
Segment Reporting [Abstract]
Number of Reportable Segments | item										2
Revenue:
Revenue		$ 38,453	$ 37,813	$ 34,485	$ 33,147	$ 32,860	$ 30,160	$ 29,476	$ 29,670	$ 143,898	$ 122,166
Gross Profit:
Gross Profit		9,782	8,915	8,027	8,246	8,542	6,778	6,737	7,062	34,970	29,119
Operating Expenses:
Operating Expenses										27,036	22,817
Operating Income:
Operating Income										7,934	6,302
Unallocated Amounts:
Interest and Other Expense, net										770	295
Provision for Income Taxes										2,642	1,883
Net Income		1,429	$ 1,271	$ 916	$ 906	1,577	$ 1,068	$ 878	$ 601	4,522	4,124
Total Assets:
Assets		92,097				76,707				92,097	76,707
Depreciation and Amortization:
Depreciation and Amortization										6,184	3,946
Capital Expenditures:
Capital Expenditures										5,250	4,101
Long-Lived Assets:
Long-Lived Assets		15,568				12,313				15,568	12,313
United States [Member]
Revenue:
Revenue	[1],[2]									129,732	109,770
Long-Lived Assets:
Long-Lived Assets	[2]	14,550				11,337				14,550	11,337
Canada [Member]
Revenue:
Revenue	[1]									12,432	10,854
Long-Lived Assets:
Long-Lived Assets		1,018				976				1,018	976
Other International [Member]
Revenue:
Revenue	[1]									1,734	1,542
Service Segment [Member]
Revenue:
Revenue										71,103	59,202
Gross Profit:
Gross Profit										19,039	15,585
Operating Expenses:
Operating Expenses	[3]									14,270	11,430
Additional allocation of expenses										500
Operating Income:
Operating Income										4,769	4,155
Total Assets:
Assets		51,756				48,640				51,756	48,640
Depreciation and Amortization:
Depreciation and Amortization	[4]									4,660	3,216
Capital Expenditures:
Capital Expenditures										2,662	3,133
Distribution [Member]
Revenue:
Revenue										72,795	62,964
Gross Profit:
Gross Profit										15,931	13,534
Operating Expenses:
Operating Expenses	[3]									12,766	11,387
Operating Income:
Operating Income										3,165	2,147
Total Assets:
Assets		36,812				24,878				36,812	24,878
Depreciation and Amortization:
Depreciation and Amortization	[4]									1,524	730
Capital Expenditures:
Capital Expenditures										2,588	968
Segment Reconciling Items [Member]
Unallocated Amounts:
Interest and Other Expense, net										770	295
Provision for Income Taxes										2,642	1,883
Unallocated Amounts										3,412	2,178
Unallocated [Member]
Total Assets:
Assets		$ 3,529				$ 3,189				$ 3,529	$ 3,189

[1] Revenues are attributed to the countries based on the destination of a product shipment or the location where service is rendered.

[2] United States includes Puerto Rico.

[3] Operating expense allocations between segments are based on actual amounts, a percentage of revenues, headcount, and management's estimates. In fiscal year 2017, $0.5 million more of operating expenses were allocated to the Service segment than in fiscal year 2016 as Service revenue was a greater percentage of total revenue.

[4] Including amortization of catalog costs and intangible assets.