Note 4 - Segment Information - Segment and Geographic Data (Details) - USD ($) $ in Thousands		3 Months Ended						9 Months Ended
		Dec. 24, 2022	Sep. 24, 2022	Jun. 25, 2022	Dec. 25, 2021	Sep. 25, 2021	Jun. 26, 2021	Dec. 24, 2022	Dec. 25, 2021
Revenue	[1]	$ 57,402			$ 50,902			$ 168,502	$ 149,079
Gross Profit		16,400			13,636			49,205	41,767
Operating Expenses		13,237			11,275			38,812	32,139
Operating Income		3,163			2,361			10,393	9,628
Interest and Other Expense, net		1,039			136			1,732	581
Provision for Income Taxes		523			596			1,631	715
Total		1,562			732			3,363	1,296
Net Income		1,601	$ 2,357	$ 3,072	1,629	$ 3,015	$ 3,688	7,030	8,332
UNITED STATES
Revenue	[1],[2]	51,209			46,005			151,242	136,359
CANADA
Revenue	[1]	4,221			3,749			12,075	10,849
Other International [Member]
Revenue	[1]	1,972			1,148			5,185	1,871
Service Segment [Member]
Revenue		35,977			30,237			105,120	87,338
Gross Profit		10,793			8,983			33,115	27,447
Operating Expenses	[3]	8,957			7,322			26,240	20,165
Operating Income		1,836			1,661			6,875	7,282
Distribution Segment [Member]
Revenue		21,425			20,665			63,382	61,741
Gross Profit		5,607			4,653			16,090	14,320
Operating Expenses	[3]	4,280			3,953			12,572	11,974
Operating Income		$ 1,327			$ 700			$ 3,518	$ 2,346

[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.