Supplemental Balance Sheet Information

12 Months Ended

Jun. 30, 2018

Supplemental Balance Sheet Information [Abstract]

Supplemental Balance Sheet Disclosures [Text Block]

8. Supplemental Balance Sheet Information

		June 30,
		2018			2017
Inventories
Work in progress		$	388,252		$	468,839
Component parts			6,775,870			7,271,908
Finished goods			2,285,836			2,368,855
Reserve for obsolete and excess inventory			(1,619,417	)		(1,597,648	)
		$	7,830,541		$	8,511,954
	Estimated
	Useful Life
	(years)
Property, plant and equipment
Machinery and equipment	3-10	$	18,073,352		$	18,073,352
Buildings	28-35		13,055,628			13,055,628
Land and land improvements	5-7		919,566			919,566
Total property, plant and equipment at cost			32,048,546			32,048,546
Less accumulated depreciation and amortization			(27,225,397	)		(26,314,505	)
		$	4,823,149		$	5,734,041

Depreciation expense was approximately $0.9 million, $1.0 million, and $1.2 million for the fiscal years ended June 30, 2018, 2017 and 2016, respectively.

Other accrued liabilities
Accrued compensation expense	$	1,060,777	$	1,132,534
Customer deposits		370,885		612,908
Other		419,021		264,524
	$	1,850,683	$	2,009,966