Fair value measurements (Tables)

9 Months Ended

Sep. 30, 2026

Fair Value Disclosures [Abstract]

Schedule of financial assets and liabilities that measured at fair value on a recurring basis [Table Text Block]

		September 30, 2026
		Level 1		Level 2		Level 3		Total
Current assets:
Money market funds	$	3,663,521	$	-	$	-	$	3,663,521
Non-current assets: Money market funds - Restricted cash	$	8,075,075	$	-	$	-	$	8,075,075
Total assets measured at fair value	$	11,738,596	$	-	$	-	$	11,738,596
		December 31, 2025
		Level 1		Level 2		Level 3		Total
Current assets:
Money market funds	$	7,812,918	$	-	$	-	$	7,812,918
Total assets measured at fair value	$	7,812,918	$	-	$	-	$	7,812,918