Consolidated Statements Of Operations - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Revenue from External Customer [Line Items]
Net Income (Loss) Available to Common Stockholders, Basic	$ (66,160)	$ 85,470	$ 238,054	$ (124,053)
Revenues	$ 2,700,757	$ 2,898,088	$ 5,375,826	$ 5,311,882
Weighted average shares - basic	7,415,329	7,415,329	7,415,329	7,415,329
Cost of Goods and Services Sold	$ 1,539,563	$ 1,665,820	$ 3,203,437	$ 3,169,689
Research and development	260,439	244,529	551,628	453,851
Other Nonoperating Income (Expense)	0	0	506,305	0
Interest income	85	193	182	732
Interest Expense	4,186	5,469	8,883	10,987
Operating Income (Loss)	(49,053)	103,752	(233,538)	(87,822)
Net income (loss)	(53,154)	98,476	264,066	(98,077)
Preferred Stock Dividends, Income Statement Impact	13,006	13,006	26,012	25,976
Marketing, general and administrative	949,808	883,987	1,854,299	1,776,164
Costs and Expenses	2,749,810	2,794,336	5,609,364	5,399,704
Nonoperating Income (Expense)	$ (4,101)	$ (5,276)	$ 497,604	$ (10,255)
Earnings (Loss) Per Share, Basic	$ (0.01)	$ 0.01	$ 0.03	$ (0.02)
Weighted Average Number of Shares Outstanding, Diluted	7,415,329	12,706,562	13,049,616	7,415,329
Earnings (Loss) Per Share, Diluted	$ (0.01)	$ 0.01	$ 0.02	$ (0.02)
Costs and expenses:
Cost of Goods and Services Sold	$ 1,539,563	$ 1,665,820	$ 3,203,437	$ 3,169,689
Marketing, general and administrative	949,808	883,987	1,854,299	1,776,164
Research and development	260,439	244,529	551,628	453,851
Total costs and expenses	2,749,810	2,794,336	5,609,364	5,399,704
Operating Income (Loss)	(49,053)	103,752	(233,538)	(87,822)
Other (expense) income:
Other Nonoperating Income (Expense)	0	0	506,305	0
Interest income	85	193	182	732
Interest expense	(4,186)	(5,469)	(8,883)	(10,987)
Total other (expense) income	(4,101)	(5,276)	497,604	(10,255)
Net income (loss)	(53,154)	98,476	264,066	(98,077)
Preferred Stock Dividends, Income Statement Impact	13,006	13,006	26,012	25,976
Net Income (Loss) Available to Common Stockholders, Basic	$ (66,160)	$ 85,470	$ 238,054	$ (124,053)
Net income (loss) per share
Earnings (Loss) Per Share, Basic	$ (0.01)	$ 0.01	$ 0.03	$ (0.02)
Earnings (Loss) Per Share, Diluted	$ (0.01)	$ 0.01	$ 0.02	$ (0.02)
Weighted average shares - basic	7,415,329	7,415,329	7,415,329	7,415,329
Weighted Average Number of Shares Outstanding, Diluted	7,415,329	12,706,562	13,049,616	7,415,329
Revenue Benchmark [Member] | Geographic Concentration Risk [Member]
Revenue from External Customer [Line Items]
Revenues	$ 2,701,000	$ 2,898,000	$ 5,376,000	$ 5,312,000
International [Member] | Revenue Benchmark [Member] | Geographic Concentration Risk [Member]
Revenue from External Customer [Line Items]
Revenues	1,341,000	1,033,000	2,391,000	1,904,000
Product [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,521,467	2,655,456	5,001,274	4,839,712
Service [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 179,290	$ 242,632	$ 374,552	$ 472,170