Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating activities:
Net income (loss)	$ 69,682	$ (1,758,560)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	437,816	601,194
Stock-based compensation	15,918	22,604
Non-cash life insurance policy reduction / (accretion)		20,329
Non-cash other revenue	(259,299)
Non-cash miscellaneous loss	24,618
(Gain) loss on sale of property, plant and equipment	(434,549)	3,966
Foreign currency transaction (gain) loss	18,942	8,983
(Increase) decrease in trade, accounts & notes receivable, and deposits from related parties	(812,477)	(295,226)
(Increase) decrease in inventories	1,090,895	31,270
(Increase) decrease in refundable income taxes	(2,251)	3,373
(Increase) decrease in prepaid expenses and other current assets	(45,501)	(212,124)
(Increase) decrease in other assets	(76,128)	(63,302)
Increase (decrease) in income taxes payable	11,323	(5,711)
Increase (decrease) in accounts payable & accrued expenses, deferred revenue, and other noncurrent liabilities	(12,350)	793,335
Net cash provided by (used in) operating activities	26,639	(849,869)
Investing activities:
Purchase of property, plant and equipment	(84,457)	(96,700)
Proceeds from the sale of property, plant and equipment		5,270
Proceeds from the redemption of life insurance policy		3,066,193
Payments received on notes receivables - related parties	131,003	86,266
Net cash provided by investing activities	46,546	3,061,029
Financing activities:
Proceeds from line of credit borrowings	500,000
Principal payments on long-term borrowings		(3,045,421)
Net cash provided by (used in) financing activities	500,000	(3,045,421)
Effect of exchange rate changes on cash and cash equivalents	(22,380)	(65,690)
Increase (decrease) in cash and cash equivalents	550,805	(899,951)
Cash and cash equivalents at beginning of period	1,989,974	3,272,788
Cash and cash equivalents at end of period	$ 2,540,779	$ 2,372,837