Quaterly financial data (Unaudited) (Details 1) - USD ($)	3 Months Ended	6 Months Ended		12 Months Ended
	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Income tax expense (benefit), deferred		$ 0	$ (737,300)	$ 2,490,000	$ (945,000)
Loss from continuing operations		(4,073,100)	(2,116,300)	(13,672,500)	(3,110,000)
Net loss		(4,079,400)	(2,105,300)	(13,668,100)	(3,672,500)
Total comprehensive loss		$ (3,982,200)	$ (2,001,700)	$ (13,764,500)	$ (3,681,700)
Continuing operations		$ (0.58)	$ (0.33)	$ (2.06)	$ (0.97)
Discontinued operations		0.00	0.00	0.00	(0.18)
Consolidated operations		$ (0.58)	$ (0.33)	$ (2.06)	$ (1.15)
Revenues		$ 5,237,800	$ 5,758,600	$ 11,400,500	$ 9,775,200
Cost of revenues		2,919,700	2,836,300	5,663,800	4,799,800
Gross profit		2,318,100	2,922,300	5,736,700	4,975,400
General and administrative		2,658,800	2,831,900	5,816,600	4,028,500
Selling		2,349,000	1,942,800	4,310,800	4,031,900
Research and development		1,395,800	1,516,800	2,873,300	1,623,800
Total operating expenses		6,455,100	6,291,500	17,280,800	9,684,200
Loss from operations		(4,137,000)	(3,369,200)	(11,544,100)	(4,708,800)
Other income, net		63,900	466,200	185,100	571,600
Loss from continuing operations before income tax expense (benefit)		(4,073,100)	(2,853,600)	(11,281,700)	(4,055,000)
(Loss) Gain from discontinued operations, net of tax		(6,300)	11,000	4,400	(562,500)
Unrealized holding gain (loss) on investment securities, net of tax		8,600	(400)	(10,200)	0
Foreign currency translation gain (loss)		88,600	104,000	(86,200)	(9,200)
Comprehensive gain (loss)		$ 97,200	$ 103,600	(96,400)	$ (9,200)
Effect of Restatement [Member]
Income tax expense (benefit), deferred	$ 417,200			3,743,600
Loss from continuing operations	(417,200)			(8,023,700)
Net loss	(417,200)			(8,023,700)
Total comprehensive loss	$ (417,200)			$ (8,023,700)
Continuing operations	$ (0.06)			$ (1.21)
Discontinued operations	0.00			0.00
Consolidated operations	$ (0.06)			$ (1.21)
Total operating expenses				$ 4,280,100
Loss from operations				(4,280,100)
Loss from continuing operations before income tax expense (benefit)				(4,280,100)
As Filed [Member]
Income tax expense (benefit), deferred	$ (417,200)			(1,253,600)
Loss from continuing operations	(1,292,000)			(5,648,800)
Net loss	(1,292,000)			(5,644,400)
Total comprehensive loss	$ (1,406,200)			$ (5,740,800)
Continuing operations	$ (0.18)			$ (0.85)
Discontinued operations	0.00			0.00
Consolidated operations	$ (0.18)			$ (0.85)
Revenues	$ 2,670,000			$ 11,400,500
Cost of revenues	1,320,900			5,663,800
Gross profit	1,349,100			5,736,700
General and administrative	1,607,500			5,816,600
Selling	875,700			4,310,800
Research and development	560,100			2,873,300
Total operating expenses	3,043,300			13,000,700
Loss from operations	(1,694,200)			(7,264,000)
Other income, net	(15,000)			185,100
Loss from continuing operations before income tax expense (benefit)	(1,709,200)			(7,001,600)
(Loss) Gain from discontinued operations, net of tax	0			4,400
Unrealized holding gain (loss) on investment securities, net of tax	4,100			(10,200)
Foreign currency translation gain (loss)	(118,300)			(86,200)
Comprehensive gain (loss)	(114,200)			(96,400)
As Restated [Member]
Income tax expense (benefit), deferred	0			(2,490,000)
Loss from continuing operations	(1,709,200)			(13,672,500)
Net loss	(1,709,200)			(13,668,100)
Total comprehensive loss	$ (1,823,400)			$ (13,764,500)
Continuing operations	$ (0.24)			$ (2.06)
Discontinued operations	0.00			0.00
Consolidated operations	$ (0.24)			$ (2.06)
Revenues	$ 2,670,000			$ 11,400,500
Cost of revenues	1,320,900			5,663,800
Gross profit	1,349,100			5,736,700
General and administrative	1,607,500			5,816,600
Selling	875,700			4,310,800
Research and development	560,100			2,873,300
Total operating expenses	3,043,300			17,280,800
Loss from operations	(1,694,200)			(11,544,100)
Other income, net	(15,000)			185,100
Loss from continuing operations before income tax expense (benefit)	(1,709,200)			(11,281,700)
(Loss) Gain from discontinued operations, net of tax	0			4,400
Unrealized holding gain (loss) on investment securities, net of tax	4,100			(10,200)
Foreign currency translation gain (loss)	(118,300)			(86,200)
Comprehensive gain (loss)	$ (114,200)			$ (96,400)