Income Taxes - Tax effects of temporary differences that give rise to significant portions of deferred tax assets and deferred tax liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Deferred tax assets:
Accrued expenses	$ 474	$ 537
Deferred stock compensation	334	302
Bad debt and inventory reserves	29	29
Total deferred tax assets	837	868
Deferred tax liabilities:
Property and equipment	1,925	5
Total net deferred taxes	$ (1,088)	$ 863