Note 4 - Property and Equipment, Net - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Mar. 31, 2017
Property and equipment, gross	$ 602	$ 735
Less: accumulated depreciation	(523)	(650)
Total property and equipment, net	79	85
Computer Equipment [Member]
Property and equipment, gross	327	360
Furniture and Equipment [Member]
Property and equipment, gross	231	316
Leasehold Improvements [Member]
Property and equipment, gross	$ 44	$ 59