SEGMENT AND GEOGRAPHIC DATA (Segment and Geographic Data) (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Mar. 28, 2015	Dec. 27, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 28, 2015	Mar. 29, 2014
Revenue:
Revenue		$ 32,342	$ 31,052	$ 31,111	$ 29,119	$ 30,403	$ 30,513	$ 28,882	$ 28,710	$ 123,624	$ 118,508
Gross Profit:
Gross Profit		8,498	6,994	6,926	6,669	8,617	7,138	6,821	7,214	29,087	29,790
Operating Expenses:
Operating Expenses										22,319	23,085
Operating Income:
Operating Income										6,768	6,705
Unallocated Amounts:
Unallocated Amounts										2,742	2,721
Net Income		1,909	$ 813	$ 859	$ 445	1,704	$ 788	$ 771	$ 721	4,026	3,984
Total Assets:
Total Assets		62,149				53,874				62,149	53,874
Depreciation and Amortization (2):
Depreciation and Amortization	[1]									3,090	2,945
Capital Expenditures:
Capital Expenditrures		3,500				1,961				3,500	1,961
United States [Member]
Long-Lived Assets:
Long-Lived Assets	[2]	8,782				6,635				8,782	6,635
Canada [Member]
Long-Lived Assets:
Long-Lived Assets		615				454				615	454
Total [Member]
Long-Lived Assets:
Long-Lived Assets		9,397				7,089				9,397	7,089
United States [Member]
Revenues to Unaffiliated Customers (3):
Geographic Data	[2],[3]									110,077	107,007
Canada [Member]
Revenues to Unaffiliated Customers (3):
Geographic Data	[3]									11,075	9,235
Other International [Member]
Revenues to Unaffiliated Customers (3):
Geographic Data	[3]									2,472	2,266
Total [Member]
Revenues to Unaffiliated Customers (3):
Geographic Data	[3]									123,624	118,508
Segment Reconciling Items [Member]
Total Assets:
Total Assets		4,377				4,257				4,377	4,257
Service Segment [Member]
Revenue:
Revenue										51,801	48,184
Gross Profit:
Gross Profit										14,103	12,825
Operating Expenses:
Operating Expenses	[4]									10,410	10,446
Operating Income:
Operating Income										3,693	2,379
Total Assets:
Total Assets		31,552				24,902				31,552	24,902
Depreciation and Amortization (2):
Depreciation and Amortization	[1]									2,362	2,144
Capital Expenditures:
Capital Expenditrures		2,409				1,520				2,409	1,520
Distribution [Member]
Revenue:
Revenue										71,823	70,324
Gross Profit:
Gross Profit										14,984	16,965
Operating Expenses:
Operating Expenses	[4]									11,909	12,639
Operating Income:
Operating Income										3,075	4,326
Total Assets:
Total Assets		26,220				24,715				26,220	24,715
Depreciation and Amortization (2):
Depreciation and Amortization	[1]									728	801
Capital Expenditures:
Capital Expenditrures		$ 1,091				$ 441				1,091	441
Unallocated Interest and Other Expense, Net [Member]
Unallocated Amounts:
Unallocated Amounts										345	259
Unallocated Provision for Income Taxes [Member]
Unallocated Amounts:
Unallocated Amounts										$ 2,397	$ 2,462

[1] Including amortization of catalog costs.

[2] United States includes Puerto Rico.

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

[4] Operating expense allocations between segments were based on actual amounts, a percentage of revenues, headcount, and management's estimates.