Note 4 - Segment Information - Segment and Geographic Data (Details) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Sep. 24, 2022	Jun. 25, 2022	Sep. 25, 2021	Jun. 26, 2021	Sep. 24, 2022	Sep. 25, 2021
Revenue	[1]	$ 56,439		$ 50,387		$ 111,100	$ 98,177
Gross Profit		16,767		14,611		32,805	28,131
Operating Expenses		13,141		11,033		25,575	20,864
Operating Income		3,626		3,578		7,230	7,267
Interest and Other Expense, net		537		250		693	445
Provision for Income Taxes		732		313		1,108	119
Total		1,269		563		1,801	564
Net Income		2,357	$ 3,072	3,015	$ 3,688	5,429	6,703
UNITED STATES
Revenue	[1],[2]	51,036		46,441		100,033	90,353
CANADA
Revenue	[1]	3,868		3,454		7,855	7,100
Other International [Member]
Revenue	[1]	1,535		492		3,212	724
Service Segment [Member]
Revenue		35,267		29,544		69,143	57,101
Gross Profit		11,487		9,712		22,322	18,464
Operating Expenses	[3]	8,980		7,065		17,283	12,843
Operating Income		2,507		2,647		5,039	5,621
Distribution Segment [Member]
Revenue		21,172		20,843		41,957	41,076
Gross Profit		5,280		4,899		10,483	9,667
Operating Expenses	[3]	4,161		3,968		8,292	8,021
Operating Income		$ 1,119		$ 931		$ 2,191	$ 1,646

[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.