Note 12 - Stock-based Compensation (Tables)

9 Months Ended

Dec. 31, 2023

Notes Tables

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

	Nine-Month Periods Ended
	December 31, 2023					January 1, 2023
	Weighted-					Weighted-
	Average		Number of			Average		Number of
	Exercise		Options			Exercise		Options
	Price		Outstanding			Price		Outstanding
Outstanding at Beginning of Period	$	7.32		735,500		$	7.39		635,500
Granted		5.18		130,000			6.54		120,000
Exercised		-		-			4.92		(20,000	)
Expired		6.14		(10,000	)		-		-
Outstanding at End of Period		7.01		855,500			7.32		735,500
Exercisable at End of Period		7.41		665,500			7.42		499,000

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Nine-Month Periods Ended
	December 31, 2023						January 1, 2023
Number of options issued		10,000			120,000			120,000
Grant date	November 14, 2023			June 21, 2023			June 7, 2022
Dividend yield		7.60	%		6.08	%		4.89	%
Expected volatility		20.00	%		25.00	%		30.00	%
Risk free interest rate		4.56	%		4.29	%		2.95	%
Contractual term (years)		10.00			10.00			10.00
Expected term (years)		3.00			3.00			4.00
Forfeiture rate		5.00	%		5.00	%		5.00	%
Exercise price (grant-date closing price) per option	$	4.21		$	5.26		$	6.54
Fair value per option	$	0.20		$	0.46		$	0.90

Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

	Three-Month Period Ended December 31, 2023						Three-Month Period Ended January 1, 2023
	Cost of		Marketing &				Cost of		Marketing &
	Products		Administrative		Total		Products		Administrative		Total
Options Granted in Fiscal Year	Sold		Expenses		Expense		Sold		Expenses		Expense
2021	$	-	$	-	$	-	$	-	$	11	$	11
2022		-		-		-		9		20		29
2023		5		7		12		6		7		13
2024		3		4		7		-		-		-
Total stock option compensation	$	8	$	11	$	19	$	15	$	38	$	53

	Nine-Month Period Ended December 31, 2023						Nine-Month Period Ended January 1, 2023
	Cost of		Marketing &				Cost of		Marketing &
	Products		Administrative		Total		Products		Administrative		Total
Options Granted in Fiscal Year	Sold		Expenses		Expense		Sold		Expenses		Expense
2021	$	-	$	-	$	-	$	3	$	37	$	40
2022		10		21		31		31		66		97
2023		17		24		41		12		17		29
2024		6		8		14		-		-		-
Total stock option compensation	$	33	$	53	$	86	$	46	$	120	$	166

	Three-Month Periods Ended				Nine-Month Periods Ended
Stock Granted in Fiscal Year	December 31, 2023		January 1, 2023		December 31, 2023		January 1, 2023
2021	$	-	$	9	$	-	$	76
2022		37		113		147		472
2023		23		78		160		130
2024		111		-		180		-
Total stock grant compensation	$	171	$	200	$	487	$	678

Schedule of Nonvested Share Activity [Table Text Block]

Number of Shares	Fair Value per Share		Grant Date	Vesting Period (Years)
60,412		$4.85	August 15, 2023	One
46,896		6.65	August 16, 2022	One
40,165		7.47	August 11, 2021	One
41,452		5.79	August 12, 2020	Two

Number of Shares	Fair Value per Share		Grant Date	Vesting Date
26,000		$4.77	August 14, 2023	August 14, 2024
40,000		5.85	March 21, 2023	March 21, 2025
25,000		7.98	June 9, 2021	June 9, 2022
10,000		7.60	February 22, 2021	February 22, 2023
20,000		4.92	June 10, 2020	June 10, 2022