Note 2 - Sale of Subsidiaries and Subsequent Events - Summary of Condensed Balance Sheet (Details) - USD ($) $ in Thousands		Jul. 31, 2023		Apr. 30, 2023	Jan. 31, 2023	Jul. 31, 2022	Apr. 30, 2022	Jan. 31, 2022
Cash and cash equivalents		$ 494	[1]		$ 778
Accounts receivable, net of allowance for doubtful accounts of $504 at each of July 31, 2023 and January 31, 2023		7,143	[2]		3,993
Inventories, net		15,651	[1],[2]		15,318
Prepaid expenses and other current assets		1,273	[1],[2]		2,144
Total current assets		24,561	[1]		22,233
Property and equipment, net		3,620	[1],[2]		3,945
Operating lease right-of-use assets		1,626	[1]		1,749
Intangible assets, net		4,418	[1]		4,931
Total assets		34,225	[1]		32,858
Accounts payable		2,459	[1],[2]		4,101
Deferred revenue		309	[1],[3]		164
Accrued expenses and other current liabilities		3,386	[1],[2]		2,247
Income taxes payable		1,585	[1]		1,516
Operating lease liabilities - current		903	[1]		903
Note payable, net		3,343	[1]		0
Total current liabilities		11,985	[1]		8,931
Operating lease liabilities - non-current		723	[1]		846
Deferred tax liability		41	[1]		29
Total liabilities		12,749	[1],[4],[5]		9,806
Preferred stock, $1.00 par value; 2,000 shares authorized; 1,683 shares issued and outstanding at each of July 31, 2023 and January 31, 2023		37,779			37,779
Common stock, $0.01 par value; 40,000 shares authorized; 15,721 shares issued at each of July 31, 2023 and January 31, 2023		157			157
Additional paid-in capital		129,738	[1]		129,580
Treasury stock, at cost (1,933 shares at each of July 31, 2023 and January 31, 2023 )		(16,863)	[1]		(16,863)
Accumulated deficit		(129,369)	[1],[6]		(127,635)
Accumulated other comprehensive gain		34	[1]		34
Total stockholders’ equity		21,476	[1]	$ 22,862	23,052	$ 25,661	$ 27,129	$ 30,263
Total liabilities and stockholders’ equity		34,225	[1]		$ 32,858
Pro Forma Adjustments [Member]
Cash and cash equivalents		7,304
Accounts receivable, net of allowance for doubtful accounts of $504 at each of July 31, 2023 and January 31, 2023	[2]	0
Inventories, net	[2]	0
Prepaid expenses and other current assets	[2]
Total current assets		7,304
Property and equipment, net	[2]	0
Operating lease right-of-use assets		0
Intangible assets, net		0
Total assets		7,304
Accounts payable	[2]	0
Deferred revenue	[3]	0
Accrued expenses and other current liabilities	[2]	0
Income taxes payable		0
Operating lease liabilities - current		0
Note payable, net		(3,343)
Total current liabilities		(3,343)
Operating lease liabilities - non-current		0
Deferred tax liability		0
Total liabilities		(3,343)
Preferred stock, $1.00 par value; 2,000 shares authorized; 1,683 shares issued and outstanding at each of July 31, 2023 and January 31, 2023		0
Common stock, $0.01 par value; 40,000 shares authorized; 15,721 shares issued at each of July 31, 2023 and January 31, 2023		0
Additional paid-in capital		0
Treasury stock, at cost (1,933 shares at each of July 31, 2023 and January 31, 2023 )		0
Accumulated deficit	[6]	10,647
Accumulated other comprehensive gain		0
Total stockholders’ equity		10,647
Total liabilities and stockholders’ equity		7,304
Pro Forma [Member]
Cash and cash equivalents		7,798
Accounts receivable, net of allowance for doubtful accounts of $504 at each of July 31, 2023 and January 31, 2023	[2]	6,199
Inventories, net	[2]	10,620
Prepaid expenses and other current assets	[2]	961
Total current assets		25,578
Property and equipment, net	[2]	836
Operating lease right-of-use assets		1,626
Intangible assets, net		3,225
Total assets		31,265
Accounts payable	[2]	1,593
Deferred revenue	[3]	299
Accrued expenses and other current liabilities	[2]	2,696
Income taxes payable		1,585
Operating lease liabilities - current		903
Note payable, net		0
Total current liabilities		7,076
Operating lease liabilities - non-current		723
Deferred tax liability		41
Total liabilities		7,840
Preferred stock, $1.00 par value; 2,000 shares authorized; 1,683 shares issued and outstanding at each of July 31, 2023 and January 31, 2023		37,779
Common stock, $0.01 par value; 40,000 shares authorized; 15,721 shares issued at each of July 31, 2023 and January 31, 2023		157
Additional paid-in capital		129,738
Treasury stock, at cost (1,933 shares at each of July 31, 2023 and January 31, 2023 )		(16,863)
Accumulated deficit	[6]	(127,420)
Accumulated other comprehensive gain		34
Total stockholders’ equity		23,425
Total liabilities and stockholders’ equity		31,265
Subsidiaries [Member]
Cash and cash equivalents		0
Accounts receivable, net of allowance for doubtful accounts of $504 at each of July 31, 2023 and January 31, 2023	[2]	(944)
Inventories, net	[2]	(5,031)
Prepaid expenses and other current assets	[2]	(312)
Total current assets		(6,287)
Property and equipment, net	[2]	(2,784)
Operating lease right-of-use assets		0
Intangible assets, net		(1,193)
Total assets		(10,264)
Accounts payable	[2]	(866)
Deferred revenue	[3]	(10)
Accrued expenses and other current liabilities	[2]	(690)
Income taxes payable		0
Operating lease liabilities - current		0
Note payable, net		0
Total current liabilities		(1,566)
Operating lease liabilities - non-current		0
Deferred tax liability		0
Total liabilities		(1,566)
Preferred stock, $1.00 par value; 2,000 shares authorized; 1,683 shares issued and outstanding at each of July 31, 2023 and January 31, 2023		0
Common stock, $0.01 par value; 40,000 shares authorized; 15,721 shares issued at each of July 31, 2023 and January 31, 2023		0
Additional paid-in capital		0
Treasury stock, at cost (1,933 shares at each of July 31, 2023 and January 31, 2023 )		0
Accumulated deficit	[6]	(8,698)
Accumulated other comprehensive gain		0
Total stockholders’ equity		(8,698)
Total liabilities and stockholders’ equity		$ (10,264)

[1] Reflects the condensed consolidated balance sheet as of July 31, 2023 and condensed consolidated statement of operations for the three and six months ended July 31, 2023 in the Form 10-Q.

[2] Adjustments represent the disposition of assets and liabilities of the Klein operations.

[3] Reflects the consummation of the Sale of Klein in accordance with the terms of the SPA.

[4] Adjustments to accumulated deficit reflect the estimated gain on Sale of Klein. The estimated gain has not been reflected in the accompanying statements of operations as it is not related to continuing operations. The actual gain or loss on Sale of Klein will be recorded in the Company's financial statements for the quarter ending October 31, 2023, and will differ from this estimate.

[5] Reflects removal of interest expense that would not have been incurred if the Sale of Klein had been completed February 1, 2021.

[6] Adjustments represent the elimination of income and expenses of the Klein operations.