Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Summary of Significant Accounting Policies (Details) [Line Items]
Bank borrowings	$ 40,800
Bad debt expense	$ 1,429	$ 1,117
Land use right, useful life	50 years
Inspection charges and selling expenses	$ 3,700	3,900
Research and development costs	800	1,100
PRC received government subsidies	1,200	1,200
Accumulated other comprehensive income	$ 8,191	4,590
Assets and liabilities translation rate, description	Assets and liabilities at December 31, 2021 and 2020 were translated at RMB6.38 and RMB6.52 to $1.00 respectively.
Average translation rate applied to income statement accounts and statement of cash flows, description	The average translation rates applied to income statement accounts and consolidated statements of cash flows for the years ended December 31, 2021 and 2020 were RMB6.45 and RMB6.90 to $1.00, respectively
Gains or losses from exchange rate fluctuations	$ 2,100	2,000
Accounts Receivable [Member]
Summary of Significant Accounting Policies (Details) [Line Items]
Bad debt expense	1,400	1,100
Allowance for doubtful accounts	$ 7,900	$ 6,500