Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash	$ 5,666,000	$ 8,763,000	[1]
Investments	375,000	343,000	[1]
Accounts receivable, net of allowance for doubtful accounts of $83,000 as of March 31, 2018 and December 31, 2017	6,463,000	4,597,000	[1]
Accounts receivable, related party	381,000	361,000	[1]
Inventories	10,635,000	10,249,000	[1]
Prepaid expenses	3,455,000	2,665,000	[1]
Total current assets	26,975,000	26,978,000	[1]
Property and equipment, net	3,115,000	3,158,000	[1]
Goodwill	55,000	55,000	[1]
Definite-lived intangible assets, net	20,000	21,000	[1]
Deferred income tax assets	19,000	19,000	[1]
Equity investments in unconsolidated affiliate	4,032,000	3,893,000	[1]
Total assets	34,216,000	34,124,000	[1]
Current liabilities:
Accounts payable	1,042,000	1,236,000	[1]
Accrued liabilities	1,764,000	1,565,000	[1]
Total current liabilities	2,806,000	2,801,000	[1]
Commitments
Shareholders' equity:
Common stock, $.01 par value: 50,000,000 shares authorized; 14,187,749 and 14,290,749 shares outstanding as of March 31, 2018 and December 31, 2017, respectively	142,000	143,000	[1]
Additional paid-in capital	4,995,000	5,415,000	[1]
Accumulated other comprehensive loss		(458,000)	[1]
Retained earnings	26,273,000	26,223,000	[1]
Total shareholders' equity	31,410,000	31,323,000	[1]
Total liabilities and shareholders' equity	$ 34,216,000	$ 34,124,000	[1]

[1] The condensed consolidated balance sheet as of December 31, 2017 has been prepared using information from the audited consolidated balance sheet as of that date.