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Property and Equipment - Property and Equipment (Details) - USD ($) $ in Thousands	Jan. 31, 2022	Jan. 31, 2021
Cost	$ 45,471	$ 42,422
Accumulated amortization	34,654	30,333
Net	10,817	12,089
Computer Equipment [Member]
Cost	40,937	37,469
Accumulated amortization	31,660	28,123
Furniture and Fixtures [Member]
Cost	1,553	1,494
Accumulated amortization	1,257	1,081
Leasehold Improvements [Member]
Cost	822	807
Accumulated amortization	531	401
Equipment Installed With Customers [Member]
Cost	1,635	1,654
Accumulated amortization	1,206	728
Asset under Construction [Member]
Cost	$ 524	$ 998

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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