Condensed Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating activities:
Net income	$ 337,000	$ 90,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	41,000	40,000
Provision for sales returns and doubtful accounts		4,000
Stock based compensation	8,000	6,000
Changes in assets and liabilities:
Accounts receivable	(272,000)	(2,000)
Inventories	177,000	177,000
Prepaid expenses and other current assets	(83,000)	(63,000)
Accounts payable	404,000	220,000
Accrued liabilities	14,000	(74,000)
All other operating activities	(1,000)	0
Total adjustments	288,000	308,000
Net cash provided by operating activities	625,000	398,000
Investing activities:
Acquisition of property and equipment	(1,000)	0
Net cash used for investing activities	(1,000)	0
Financing activities:
Dividend payments	(233,000)	(201,000)
Proceeds from stock options exercised	0	54,000
Net cash used for financing activities	(233,000)	(147,000)
Impact of exchange rates on cash	(13,000)	0
Net increase in cash and cash equivalents	378,000	251,000
Cash and cash equivalents, beginning of period	6,652,000	5,313,000
Cash and cash equivalents, end of period	7,030,000	5,564,000
Supplemental disclosures of cash flow information:
Cash paid for interest	0	0
Cash paid for income taxes, net	$ 0	$ 0