Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
ASSETS
Cash and cash equivalents	$ 5,836	$ 9,248
Marketable securities	8,295	5,771
Accounts receivable, less allowance for doubtful accounts of $322 at December 31, 2019 and $314 at December 31, 2018	16,059	15,859
Inventories	15,580	16,163
Prepaid expenses	559	526
Other current assets	1,020	1,570
Total current assets	47,349	49,137
Marketable securities, long-term	12,168	10,322
Equipment and leasehold improvements, net	3,341	2,861
Intangibles, net	310	333
Goodwill	1,366	1,366
Right-of-use assets (operating leases)	2,111	0
Other assets	0	259
Trade notes receivable, long-term	962	0
Deferred tax assets	4,992	5,422
Total assets	72,599	69,700
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable	7,023	8,513
Advance customer payments	499	636
Accrued expenses	2,572	3,568
Current operating lease liabilities	688	0
Total current liabilities	10,782	12,717
Other liabilities	202	629
Long-term operating lease liabilities	3,141	0
Reserve for income taxes	150	143
Total liabilities	14,275	13,489
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, 7,154,591 shares issued and outstanding at December 31, 2019 and 7,100,825 shares issued and outstanding at December 31, 2018	36,659	35,637
Accumulated other comprehensive loss	(1,406)	(1,690)
Retained earnings	23,071	22,264
Total stockholders’ equity	58,324	56,211
Total liabilities and stockholders’ equity	$ 72,599	$ 69,700