CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 3,456	$ 1,918
Trade accounts receivable, net	7,902	10,616
Inventories, net	23,952	22,105
Prepaid expenses and other current assets	1,892	1,578
Total current assets	37,202	36,217
Property, plant and equipment, net	5,366	4,884
Operating lease right-of-use (ROU) assets	1,560	1,991
Investments	742	1,481
Deferred tax assets, net	4,116	4,116
Other assets	422	143
Total assets	49,408	48,832
Current liabilities:
Accounts payable	9,822	12,898
Accrued compensation and related taxes	1,302	1,143
Accrued warranty expense	722	591
Accrued other expenses and other current liabilities	363	700
Short-term operating lease liabilities	525	485
Credit facility	6,476	5,854
Notes payable-current portion	71	277
Deferred revenue	1,137	1,022
Total current liabilities	20,418	22,970
Notes payable, net of current portion	0	329
Long-term operating lease liabilities	1,260	1,785
Deferred revenue	6,419	3,613
Total liabilities	28,097	28,697
Stockholders' equity:
Preferred stock; $1.00 par value; 1,000,000 authorized shares; none issued or outstanding	0	0
Common stock; $0.60 par value; 10,000,000 authorized shares; 3,867,082 and 3,686,939 issued and 3,577,002 and 3,396,859 outstanding shares as of December 31, 2023 and 2022, respectively	2,320	2,212
Additional paid-in capital	48,602	45,304
Accumulated deficit	(24,209)	(21,979)
Treasury stock, at cost, 290,080 shares as of December 31, 2023, and 2022, respectively	(5,402)	(5,402)
Total stockholders' equity	21,311	20,135
Total liabilities and stockholders' equity	$ 49,408	$ 48,832