Property and Equipment - Summary (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Property, Plant and Equipment [Line Items]
Cost	$ 4,428	$ 3,964
Accumulated Depreciation	3,569	3,482
Net Book Value	859	482
Automobiles
Property, Plant and Equipment [Line Items]
Cost	342	451
Accumulated Depreciation	280	396
Net Book Value	62	55
Software
Property, Plant and Equipment [Line Items]
Cost	165	160
Accumulated Depreciation	46	23
Net Book Value	119	137
Equipment
Property, Plant and Equipment [Line Items]
Cost	2,009	1,571
Accumulated Depreciation	1,555	1,439
Net Book Value	454	132
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Cost	615	575
Accumulated Depreciation	543	519
Net Book Value	72	56
Leasehold improvements
Property, Plant and Equipment [Line Items]
Cost	1,297	1,207
Accumulated Depreciation	1,145	1,105
Net Book Value	$ 152	$ 102