Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2022	Jul. 31, 2021
Cash flows from operating activities:
Net loss	$ (4,339)	$ (6,644)
Adjustments to reconcile net loss to net cash used in operating activities:
PPP loan forgiveness	0	(850)
Depreciation and amortization	946	1,226
Stock-based compensation	388	236
Recovery of doubtful accounts	0	(453)
Provision for inventory obsolescence	45	350
Changes in:
Accounts receivable	1,998	(140)
Unbilled revenue	15	21
Inventories	(461)	(542)
Prepaid expenses and other current and long-term assets	168	(260)
Income taxes receivable and payable	19	(63)
Accounts payable, accrued expenses and other current liabilities	(1,126)	375
Deferred revenue	95	(292)
Net cash used in operating activities	(2,497)	(7,191)
Cash flows from investing activities:
Purchases of property and equipment	(250)	(14)
Sale of assets held for sale	361	484
Sale of a business, net of cash sold	0	761
Net cash provided by investing activities	111	1,231
Cash flows from financing activities:
Purchase of treasury stock	(1)	(2)
Net proceeds from preferred stock offering	0	4,502
Net proceeds from common stock offering	0	43
Preferred stock dividends	(1,894)	(1,160)
Net cash (used in) provided by financing activities	(1,895)	3,383
Effect of changes in foreign exchange rates on cash and cash equivalents	0	22
Net decrease in cash and cash equivalents	(4,281)	(2,555)
Cash and cash equivalents, beginning of period	5,114	4,611
Cash and cash equivalents, end of period	833	2,056
Supplemental cash flow information:
Interest paid	4	18
Income taxes paid	277	147
Lease Pool Equipment [Member]
Adjustments to reconcile net loss to net cash used in operating activities:
Gross profit from sale of assets held-for-sale	(358)	0
Other Machinery and Equipment [Member]
Adjustments to reconcile net loss to net cash used in operating activities:
Gross profit from sale of assets held-for-sale	$ 113	$ (155)