Condensed Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating activities:
Net income	$ 955,000	$ 737,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	124,000	121,000
Provision for sales returns and doubtful accounts	4,000	3,000
Stock based compensation	14,000	2,000
Loss on investments	0	185,000
Gain on sale of assets	(160,000)	0
Changes in assets and liabilities:
Accounts receivable	147,000	255,000
Inventories	390,000	252,000
Prepaid expenses and other current assets	(23,000)	4,000
Accounts payable	(584,000)	(137,000)
Accrued liabilities	(13,000)	(25,000)
Other assets and liabilities	4,000	12,000
Total adjustments	(97,000)	672,000
Net cash provided by operating activities	858,000	1,409,000
Investing activities:
Acquisition of property and equipment	(12,000)	(5,000)
Proceeds from sale of assets	200,000	0
Payment for investment in convertible securities	(186,000)	0
Net cash provided by (used for) investing activities	2,000	(5,000)
Financing activities:
Payments on notes payable	0	(500,000)
Dividend payments	(516,000)	(418,000)
Proceeds from stock options exercised	126,000	60,000
Net cash used for financing activities	(390,000)	(858,000)
Impact of exchange rates on cash	5,000	(6,000)
Net increase in cash and cash equivalents	475,000	540,000
Cash and cash equivalents, beginning of period	4,494,000	3,250,000
Cash and cash equivalents, end of period	4,969,000	3,790,000
Supplemental disclosures of cash flow information:
Cash paid for interest	0	9,000
Cash paid for income taxes, net	$ 3,000	$ 3,000