Stockholders’ equity (Tables)

3 Months Ended

Mar. 31, 2024

Equity [Abstract]

Schedule of company recognized stock compensation expense

	Three months ended March 31,
	2024		2023
Cost of services	$	-	$	-
Research and development		25,856		70,364
General and administrative		157,984		105,832
Sales and marketing		4,397		34,926
	$	188,237	$	211,122

Schedule of stock purchase warrants

				Outstanding at
Issuance	Exercise Price		Expiration	March 31, 2024 (1)		December 31, 2023 (1)
February 2015	$	660,000.00	February 2025		3		3
October 2019	$	400.00	October 2024		1,770		1,770
October 2019	$	520.00	October 2024		1,175		1,175
November 2020	$	504.40	May 2026		1,211		1,211
February 2021	$	780.00	August 2026		2,084		2,084
May 2023	$	7.785	(2)		889,274		889,274
October 2023	$	3.36	April 2029		200,000		200,000
					1,095,517		1,095,517

The warrants listed above were issued in connection with various equity, debt, or development contract agreements.

(1) Warrants to purchase fractional shares of common stock resulting from the reverse stock splits effected on January 5, 2023 and May 20, 2024 were rounded up to the next whole share of common stock on a holder by holder basis.

(2) Warrants will be exercisable beginning on the date of stockholder approval of the exercisability of the warrants under Nasdaq rules. Once exercisable, the warrants will expire on the five-year anniversary of the date of such stockholder approval.