Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Operating activities
Net loss	$ (625,055)	$ (1,224,667)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	984,031	1,003,096
Stock-based compensation	60,342	63,064
Non-cash life insurance policy accretion	(117,750)	(100,288)
Deferred income taxes	(3,000)	92,000
Foreign currency transaction (gain)/loss	(147,623)	109,491
(Increase) decrease in accounts receivable and accounts due from employees and distributors	(39,282)	156,865
(Increase) decrease in inventories	537,665	(138,490)
(Increase) decrease in refundable income taxes	425,099	(264,243)
(Increase) decrease in prepaid expenses and other current assets	66,014	95,861
(Increase) decrease in other assets	(19,936)	10,776
Increase (decrease) in accounts payable & accrued expenses and other non-current liabilities	404,767	(603,020)
Net cash provided by (used in) operating activities	1,525,272	(799,555)
Investing activities
Proceeds from sale of property, plant, and equipment	912	7,281
Purchase of property, plant, and equipment	(173,903)	(250,284)
Payments received on distributor note receivable	102,818	96,845
Net cash used in investing activities	(70,173)	(146,158)
Financing activities
Repayment of revolving line of credit borrowings	0	(500,000)
Proceeds from long-term borrowings	0	3,249,501
Principal payments on long-term borrowings	(1,017,367)	(3,482,561)
Purchase of stock for treasury	(2,211)	0
Net cash used in financing activities	(1,019,578)	(733,060)
Effect of exchange rate changes on cash and cash equivalents	(90,967)	(48,356)
Increase (decrease) in cash and cash equivalents	344,554	(1,727,129)
Cash and cash equivalents at beginning of year	3,262,263	4,989,392
Cash and cash equivalents at end of year	3,606,817	3,262,263
Supplemental disclosures of cash flow information:
Cash paid during the year for: Interest	94,100	87,710
Cash paid during the year for: Income taxes paid (received), net	(398,900)	(68,000)
Noncash financing transactions (Note 13):
Issuance of promissory notes	0	424,000
Issuance of company common stock	$ 0	$ 117,000