CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
ASSETS
Cash and cash equivalents	$ 11,005	$ 8,399
Marketable securities	6,911	8,121
Accounts receivable, less allowances of $475 at September 30, 2021 and $302 at December 31, 2020	26,908	14,735
Inventories	20,677	20,271
Prepaid expenses	1,092	686
Other current assets	1,203	890
Total current assets	67,796	53,102
Marketable securities, long-term	15,593	14,052
Equipment and leasehold improvements, net	3,512	3,235
Intangible assets, net	381	325
Goodwill	1,366	1,366
Right-of-use assets (operating leases)	2,186	2,621
Trade notes receivable, long-term	209	418
Deferred tax assets	3,761	4,597
Total assets	94,804	79,716
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable	10,662	5,118
Advance customer payments	751	823
Accrued expenses	4,353	3,893
Current operating lease liabilities	850	819
Total current liabilities	16,616	10,653
Other liabilities	172	134
Long-term operating lease liabilities	2,581	3,244
Reserve for income taxes	157	157
Total liabilities	19,526	14,188
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, 7,355,549 shares issued and outstanding at September 30, 2021 and 7,294,617 shares issued and outstanding at December 31, 2020	38,628	37,817
Accumulated other comprehensive loss	(1,511)	(1,102)
Retained earnings	38,161	28,813
Total stockholders’ equity	75,278	65,528
Total liabilities and stockholders’ equity	$ 94,804	$ 79,716