Inventories

9 Months Ended

12 Months Ended

Mar. 31, 2021

Jun. 30, 2020

Inventory Disclosure [Abstract]

Inventories

Inventories are valued at the lower of cost (determined on a first-in, first-out basis) or net realizable value, and have been reduced by an allowance for excess and obsolete inventories. The estimate is based on managements review of inventories on hand compared to estimated future usage and sales. Cost of work-in-process and finished goods inventories include material, labor, and manufacturing overhead.

	March 31, 2021		June 30, 2020
Raw materials	$	2,191,200	$	1,726,400
Work-in-process		74,100		35,700
Finished goods		619,900		778,900
	$	2,885,200	$	2,541,000

	2020		2019
Raw materials	$	1,726,400	$	1,597,100
Work-in-process		35,700		77,700
Finished goods		778,900		708,800
	$	2,541,000	$	2,383,600