Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Jan. 31, 2024	Jan. 31, 2023
Cash flows from operating activities:
Net income (loss)	$ 274,000	$ (8,832,000)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization	1,516,000	1,887,000
Stock-based compensation	261,000	654,000
Non-cash cumulative translation adjustment for discontinued operations	0	1,626,000
Gain on sale of Klein	(2,343,000)	0
Provision for inventory obsolescence	341,000	445,000
Gross profit from sale of equipment	0	(939,000)
Deferred tax benefit	(153,000)	(62,000)
Changes in:
Accounts receivable	(3,343,000)	4,890,000
Unbilled revenue	25,000	(26,000)
Inventories	(3,601,000)	(1,756,000)
Income taxes receivable and payable	635,000	441,000
Accounts payable, accrued expenses and other current liabilities	(334,000)	775,000
Prepaid expenses and other current and long-term assets	(847,000)	(10,000)
Deferred revenue	3,078,000	(1,998,000)
Net cash used in operating activities	(4,967,000)	(2,905,000)
Cash flows from investing activities:
Cost incurred to develop technology	(49,000)	(12,000)
Purchases of property and equipment	(241,000)	(570,000)
Sale of other assets	476,000	1,052,000
Proceeds from the sale of Klein, net	10,832,000	0
Net cash provided by investing activities	11,018,000	470,000
Cash flows from financing activities:
Net proceeds from short-term loan	2,947,000	0
Payment on short-term loan	(3,750,000)	0
Refund of prepaid interest on short-term loan	214,000
Repurchase of common stock	0	(1,000)
Preferred stock dividends	(946,000)	(1,894,000)
Net cash used in financing activities	(1,535,000)	(1,895,000)
Effect of changes in foreign exchange rates on cash and cash equivalents	(5,000)	(6,000)
Net increase (decrease) in cash and cash equivalents	4,511,000	(4,336,000)
Cash and cash equivalents, beginning of period	778,000	5,114,000
Cash and cash equivalents, end of period	5,289,000	778,000
Other Machinery and Equipment [Member]
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Gross profit from sale of equipment	(476,000)	(939,000)
Klein Marine Services, Inc. [Member]
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Gain on sale of Klein	$ (2,343,000)	$ 0