PROPERTY AND EQUIPMENT, NET (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 3,707	$ 3,594
Accumulated depreciation	3,423	3,157
Property and equipment, net	284	437
Computer equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	741	725
Office furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	301	298
Machinery and laboratory equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	620	612
Field service units [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,712	1,626
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 333	$ 333

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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