CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
ASSETS
Cash and cash equivalents	$ 10,031	$ 8,399
Marketable securities	8,680	8,121
Accounts receivable, less allowances of $332 at March 31, 2021 and $302 at December 31, 2020	15,914	14,735
Inventories	20,662	20,271
Prepaid expenses	901	686
Other current assets	754	890
Total current assets	56,942	53,102
Marketable securities, long-term	13,587	14,052
Equipment and leasehold improvements, net	3,446	3,235
Intangible assets, net	303	325
Goodwill	1,366	1,366
Right-of-use assets (operating leases)	2,469	2,621
Trade notes receivable, long-term	333	418
Deferred tax assets	4,488	4,597
Total assets	82,934	79,716
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable	7,784	5,118
Advance customer payments	687	823
Accrued expenses	3,103	3,893
Current operating lease liabilities	827	819
Total current liabilities	12,401	10,653
Other liabilities	143	134
Long-term operating lease liabilities	3,025	3,244
Reserve for income taxes	209	157
Total liabilities	15,778	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, 7,299,376 shares issued and outstanding at March 31, 2021 and 7,294,617 shares issued and outstanding at December 31, 2020	38,208	37,817
Accumulated other comprehensive loss	(1,306)	(1,102)
Retained earnings	30,254	28,813
Total stockholders’ equity	67,156	65,528
Total liabilities and stockholders’ equity	$ 82,934	$ 79,716