Note 4 - Property and Equipment, Net - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Mar. 31, 2018
Property and equipment, gross	$ 689	$ 631
Less: accumulated depreciation	(584)	(541)
Total property and equipment, net	105	90
Computer Equipment [Member]
Property and equipment, gross	389	356
Furniture and Equipment [Member]
Property and equipment, gross	231	232
Leasehold Improvements [Member]
Property and equipment, gross	$ 69	$ 43

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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