Stockholders’ equity (Tables)

3 Months Ended

Mar. 31, 2025

Equity [Abstract]

Schedule of stock purchase warrants

				Outstanding at
Issuance	Exercise Price		Expiration	March 31, 2025		December 31, 2024
February 2015	$	660,000.00	February 2025		-		3
November 2020	$	504.40	May 2026		1,211		1,211
February 2021	$	780.00	August 2026		2,084		2,084
May 2023	$	7.785	(1)		889,274		889,274
October 2023	$	3.36	April 2029		200,000		200,000
					1,092,569		1,092,572

(1) 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.

Schedule of company recognized stock compensation expense

	Three Months Ended March 31,
	2025		2024
Cost of services	$	-	$	-
Research and development		-		25,856
General and administrative		81,708		157,984
Sales and marketing		-		4,397
	$	81,708	$	188,237