Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Cash flows from operating activities:
Net loss	$ (2,419)	$ (3,984)
Adjustments to reconcile net loss to net cash used in operating activities:
PPP loan forgiveness	0	(850)
Depreciation and amortization	479	668
Stock-based compensation	236	121
Recovery of doubtful accounts	0	(453)
Provision for inventory obsolescence	23	327
Changes in:
Accounts receivable	(871)	1,602
Unbilled revenue	(26)	51
Inventories	(260)	(739)
Prepaid expenses and other current and long-term assets	286	(239)
Income taxes receivable and payable	(66)	(168)
Accounts payable, accrued expenses and other current liabilities	(622)	947
Deferred revenue	(115)	(10)
Net cash used in operating activities	(3,522)	(2,807)
Cash flows from investing activities:
Purchases of property and equipment	(107)	(8)
Sale of assets held for sale	283	0
Sale of a business, net of cash sold	0	187
Net cash provided by investing activities	176	179
Cash flows from financing activities:
Purchase of treasury stock	(1)	(2)
Net proceeds from preferred stock offering	0	503
Net proceeds from common stock offering	0	42
Preferred stock dividends	(947)	(576)
Net cash used in financing activities	(948)	(33)
Effect of changes in foreign exchange rates on cash and cash equivalents	(3)	51
Net decrease in cash and cash equivalents	(4,297)	(2,610)
Cash and cash equivalents, beginning of period	5,114	4,611
Cash and cash equivalents, end of period	817	2,001
Supplemental cash flow information:
Interest paid	4	9
Income taxes paid	277	31
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	(280)	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	$ (80)