Fair value measurements (Tables)

3 Months Ended

Mar. 31, 2026

Fair Value Disclosures [Abstract]

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

		March 31, 2026
		Level 1		Level 2		Level 3		Total
Current assets:
Cash and cash equivalents	$	6,365,624	$	-	$	-	$	6,365,624
Total assets measured at fair value	$	6,365,624	$	-	$	-	$	6,365,624
		December 31, 2025
		Level 1		Level 2		Level 3		Total
Current assets:
Cash and cash equivalents	$	8,705,218	$	-	$	-	$	8,705,218
Total assets measured at fair value	$	8,705,218	$	-	$	-	$	8,705,218