CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (UNAUDITED) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (UNAUDITED)
Revenues	$ 2,769,100	$ 2,585,500	$ 7,899,900	$ 8,373,400
Cost of revenues	1,405,900	1,404,500	4,203,500	4,504,400
Gross profit	1,363,200	1,181,000	3,696,400	3,869,000
Operating expenses:
General and administrative	1,019,000	896,300	3,602,800	3,765,500
Selling	919,600	1,614,200	2,718,000	4,650,800
Research and development	683,200	895,900	2,059,900	2,371,900
Total operating expenses	2,621,800	3,406,400	8,380,700	10,788,200
Loss from operations	(1,258,600)	(2,225,400)	(4,684,300)	(6,919,200)
Other income:
Other income, net	38,400	5,300	32,100	95,700
Interest income	40,100	19,000	136,900	65,400
Total other income, net	78,500	24,300	169,000	161,100
Loss from continuing operations before income tax expense	(1,180,100)	(2,201,100)	(4,515,300)	(6,758,100)
Income tax expense	0	0	0	108,800
Loss from continuing operations	(1,180,100)	(2,201,100)	(4,515,300)	(6,866,900)
Discontinued operations:
Gain from discontinued operations, net of tax	0	0	0	3,300
Net loss	(1,180,100)	(2,201,100)	(4,515,300)	(6,863,600)
Comprehensive gain (loss):
Unrealized holding gain on investment securities, net of tax	0	0	0	1,600
Foreign currency translation (loss) gain	113,600	(95,700)	69,100	(85,600)
Comprehensive gain (loss)	113,600	(95,700)	69,100	(84,000)
Total comprehensive loss	$ (1,066,500)	$ (2,296,800)	$ (4,446,200)	$ (6,947,600)
Basic and Diluted loss per common share
Continuing operations	$ (0.11)	$ (0.31)	$ (0.43)	$ (0.98)
Discontinued operations	0	0	0	0
Consolidated operations	$ (0.11)	$ (0.31)	$ (0.43)	$ (0.98)