Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating activities:
Net income (loss)	$ 338,564	$ 69,682
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	429,274	437,816
Stock-based compensation		15,918
Non-cash other revenue		(259,299)
Non-cash miscellaneous loss		24,618
(Gain) loss on sale of property, plant and equipment		(434,549)
Foreign currency transaction (gain) loss	12,548	18,942
(Increase) decrease in trade, accounts & notes receivable, and deposits from related parties	33,249	(812,477)
(Increase) decrease in inventories	(140,366)	1,090,895
(Increase) decrease in refundable income taxes	(2,837)	(2,251)
(Increase) decrease in prepaid expenses and other current assets	(159,437)	(45,501)
(Increase) decrease in other assets		(76,128)
Increase (decrease) in income taxes payable	(78,136)	11,323
Increase (decrease) in accounts payable & accrued expenses, deferred revenue, and other noncurrent liabilities	338,665	(12,350)
Net cash provided by operating activities	771,524	26,639
Investing activities:
Purchase of property, plant and equipment	(26,995)	(84,457)
Payments received on notes receivables - related parties	97,235	131,003
Net cash provided by investing activities	70,240	46,546
Financing activities:
Proceeds from line of credit borrowings		500,000
Proceeds from long-term borrowings	862,000
Net cash provided by financing activities	862,000	500,000
Effect of exchange rate changes on cash and cash equivalents	5,132	(22,380)
Increase (decrease) in cash and cash equivalents	1,708,896	550,805
Cash and cash equivalents at beginning of period	1,630,779	1,989,974
Cash and cash equivalents at end of period	$ 3,339,675	$ 2,540,779