Significant Components of Consolidated Deferred Tax Assets (Liabilities) (Detail) (USD $)	Mar. 31, 2014	Mar. 31, 2013
Deferred tax liabilities:
Depreciation	$ (1,500,000)	$ (1,700,000)
Total deferred tax liabilities	(1,500,000)	(1,700,000)
Deferred tax assets:
Inventory capitalization	170,000	170,000
LIFO Inventory	700,000	785,000
Postretirement benefits other than pensions	375,000	316,000
Other	65,002	66,721
Total deferred tax assets	1,310,002	1,337,721
Net deferred tax liability	$ (189,998)	$ (362,279)