Short-term Loans - Bank Loans (Details)	9 Months Ended
	Sep. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Aug. 13, 2020 USD ($)	Aug. 12, 2020 USD ($)	Sep. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)
Short-Term Debt [Line Items]
Short-term loans	$ 13,007,649	$ 14,657,280
Line of Credit [Member] | Non-discretionary Line of Credit [Member]
Short-Term Debt [Line Items]
Maximum borrowing capacity	$ 18,000,000		$ 18,000,000	$ 22,000,000	$ 25,000,000	$ 25,000,000
Debt coverage ratio	1.25
Tangible net worth	$ 10,000,000
Tangible net worth ratio	4.0
Interest rate (as a percent)	6.50%	3.50%
Short-term loans	$ 13,007,649	$ 14,657,280
Debt instrument, term	2 years
Line of Credit [Member] | Non-discretionary Line of Credit [Member] | Minimum [Member]
Short-Term Debt [Line Items]
Interest rate (as a percent)	3.25%
Line of Credit [Member] | Non-discretionary Line of Credit [Member] | Prime Rate [Member]
Short-Term Debt [Line Items]
Basis spread (as a percent)	0.25%
Line of Credit [Member] | Discretionary Line of Credit [Member]
Short-Term Debt [Line Items]
Maximum borrowing capacity					$ 3,000,000	$ 3,000,000