CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
ASSETS
Cash and cash equivalents	$ 6,848	$ 6,944
Marketable securities	6,170	6,670
Accounts receivable, less allowance for doubtful accounts of $490 at March 31, 2018 and $473 at December 31, 2017	12,112	10,772
Inventories	14,673	14,393
Other current assets	1,842	1,593
Total current assets	41,645	40,372
Marketable securities, long-term	9,908	9,073
Equipment and leasehold improvements, net	2,292	2,307
Intangible assets, net	352	380
Goodwill	1,366	1,366
Other assets	264	261
Deferred tax assets	5,961	5,742
Total assets	61,788	59,501
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable	5,895	4,294
Advance customer payments	660	393
Accrued expenses	2,341	2,285
Total current liabilities	8,896	6,972
Other liabilities	211	88
Reserve for income taxes	160	159
Total liabilities	9,267	7,219
Commitments and contingencies
Stockholders’ equity:
Preferred stock, no par value, 5,000,000 shares authorized, none outstanding	0	0
Common stock, no par value, 25,000,000 shares authorized, 7,005,936 shares issued and outstanding at March 31, 2018 and 6,979,686 shares issued and outstanding at December 31, 2017	34,521	34,080
Accumulated other comprehensive loss	(1,264)	(1,409)
Retained earnings	19,264	19,611
Total stockholders’ equity	52,521	52,282
Total liabilities and stockholders’ equity	$ 61,788	$ 59,501