Note 18 - Stock Option Plans (Tables)

12 Months Ended

Jan. 31, 2023

Notes Tables

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

	Year Ended January 31,
	2023			2022
Risk free interest rate		2.69% - 3.03%			0.72% - 0.72%
Expected life (in years)		5.50 - 6.50			3.97 - 5.97
Expected volatility		68% -70%			63% - 63%
Expected dividend yield		0.00	%		0.00	%

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

						Weighted
						Average
				Weighted		Remaining		Aggregate
	Number of			Average		Contractual		Intrinsic
	Shares			Exercise		Term		Value
	(in thousands)			Price		(in years)		(in thousands)
Outstanding, January 31, 2022		3,425		$	3.53		6.58	$	100
Granted		895			0.81
Exercised		—			—
Forfeited		—			—
Expired		(225	)		5.30
Outstanding, January 31, 2023		4,095		$	2.84		5.91	$	—
Exercisable at January 31, 2023		2,693		$	3.68		4.25	$	—
Nonvested at January 31, 2023		1,402		$	1.23		9.11	$	—

Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

	Year Ended January 31, 2023
	Number of			Weighted Average
	Shares			Grant Date Fair
	(in thousands)			Value
Unvested, beginning of period		19		$	2.51
Granted		11			1.00
Vested		(19	)		2.51
Canceled		—			—
Unvested, end of period		11		$	1.00