Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands	3 Months Ended			6 Months Ended
	Jul. 31, 2023		Jul. 31, 2022	Jul. 31, 2023		Jul. 31, 2022
Revenues:
Revenue from Contract with Customer	$ 8,750,000	[1]	$ 8,713,000	$ 21,336,000	[1]	$ 17,800,000
Total revenues	8,750,000	[1]	8,713,000	21,336,000	[1],[2],[3],[4]	17,800,000
Cost of sales:
Total cost of sales	5,483,000	[1]	5,175,000	12,652,000	[1]	10,973,000
Gross profit	3,267,000	[1]	3,538,000	8,684,000	[1]	6,827,000
Operating expenses:
Selling, general and administrative	3,514,000	[1]	3,789,000	7,388,000	[1]	8,061,000
Research and development	842,000	[1]	833,000	1,615,000	[1]	1,847,000
Depreciation and amortization	459,000	[1]	467,000	940,000	[1]	946,000
Total operating expenses	4,815,000	[1]	5,089,000	9,943,000	[1]	10,854,000
Operating loss	(1,548,000)	[1]	(1,551,000)	(1,259,000)	[1]	(4,027,000)
Other expense:
Other, net	131,000	[1]	(76,000)	20,000	[1]	(194,000)
Total other income (expense)	131,000	[1]	(76,000)	20,000	[1]	(194,000)
Loss from continuing operations before income taxes	(1,417,000)	[1]	(1,627,000)	(1,239,000)	[1]	(4,221,000)
Provision for income taxes	(77,000)	[1]	(131,000)	(495,000)	[1]	(342,000)
Net loss from continuing operations	(1,494,000)	[1]	(1,758,000)	(1,734,000)	[1]	(4,563,000)
(Loss) income from discontinued operations, net of income taxes	0		(162,000)	0		224,000
Net loss	(1,494,000)		(1,920,000)	(1,734,000)		(4,339,000)
Preferred stock dividends - declared	0	[1]	0	0	[1]	(947,000)
Preferred stock dividends - undeclared	(947,000)	[1]	(947,000)	(1,894,000)	[1]	(947,000)
Net loss attributable to common stockholders	$ (2,441,000)	[1]	$ (2,867,000)	$ (3,628,000)	[1]	$ (6,233,000)
Net loss per common share - Basic and Diluted
Continuing operations (in dollars per share)	$ (0.18)		$ (0.20)	$ (0.26)		$ (0.47)
Discontinued operations (in dollars per share)	0		(0.01)	0		0.02
Net loss (in dollars per share)	$ (0.18)		$ (0.21)	$ (0.26)		$ (0.45)
Shares used in computing net loss per common share:
Basic (in shares)	13,792	[1]	13,782	13,791	[1]	13,779
Diluted (in shares)	13,792	[1]	13,782	13,791	[1]	13,779
Marine Technology Products [Member]
Revenues:
Revenue from Contract with Customer	$ 8,750,000		$ 8,713,000	$ 21,336,000		$ 17,800,000
Cost of sales:
Total cost of sales	$ 5,483,000	[1],[5]	$ 5,175,000	$ 12,652,000	[1]	$ 10,973,000

[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 and 2023 in the Form 10-Q.

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

[3] To record the net cash proceeds from the Sale of Klein paid on the Closing Date of $11.5 million, less estimated closing costs, estimated pay-off of the Note Payable, and estimated transaction costs, primarily legal expenses and investment broker fees, associated with the sale, all of which were incurred as part of the consummation of the Sale of Klein.

[4] To record the pay-off of the Note Payable, net of prepaid interest and debt acquisition costs, due to Sachem Capital.

[5] 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.