Short-term loans (Details) $ in Millions		12 Months Ended
	Jan. 25, 2024 USD ($)	Dec. 31, 2024 USD ($)	Jan. 14, 2025 USD ($)	Dec. 31, 2024 CAD ($)	Dec. 31, 2023 USD ($)
Short-Term Debt [Line Items]
Short-term loans		$ 14,502,367			$ 6,959,175
Non-discretionary Line of Credit | Line of Credit
Short-Term Debt [Line Items]
Maximum borrowing capacity		$ 18,000,000
Debt coverage ratio		1.25
Tangible net worth		$ 10,000,000
Tangible net worth ratio		4.0
Interest rate (as a percent)		7.25%		7.25%	8.25%
Short-term loans		$ 9,600,000			$ 7,000,000.0
Non-discretionary Line of Credit | Line of Credit | Minimum
Short-Term Debt [Line Items]
Interest rate (as a percent)		4.50%		4.50%
Non-discretionary Line of Credit | Line of Credit | Prime Rate
Short-Term Debt [Line Items]
Basis spread (as a percent)		0.25%
Non-discretionary Line of Credit | Line of Credit | Secured Overnight Financing Rate (SOFR)
Short-Term Debt [Line Items]
Basis spread (as a percent)		2.20%
Discretionary Line of Credit | Line of Credit
Short-Term Debt [Line Items]
Maximum borrowing capacity		$ 5,200,000		$ 7.5
Tangible net worth ratio		3.00
Short-term loans		$ 2,600,000			0
Current ratio		1.25		1.25
Line of credit facility, expiration, notice period		60 days
Discretionary Line of Credit | Line of Credit | Prime Rate
Short-Term Debt [Line Items]
Basis spread (as a percent)		0.50%
Revolving Foreign Exchange Facility | Line of Credit
Short-Term Debt [Line Items]
Maximum borrowing capacity		$ 3,000,000.0
CTBC Bank Co, Ltd Omnibus Credit Line | Subsequent Event [Member]
Short-Term Debt [Line Items]
Short-term loans			$ 3,000,000.0
CTBC Bank Co, Ltd Omnibus Credit Line | Line of Credit
Short-Term Debt [Line Items]
Maximum borrowing capacity	$ 2,300,000
Basis spread (as a percent)	1.20%
Short-term loans		$ 2,300,000			$ 0
Borrowing limit, percentage of export "open account" trade receivables (as a percent)	90.00%
Foremost Groups Ltd. | Mr. Liang Chou Chen
Short-Term Debt [Line Items]
Ownership percentage (as a percent)		49.91%		49.91%