Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 2,823	$ 1,918
Trade accounts receivable, net	10,790	10,616
Inventories, net	22,829	22,105
Prepaid expenses and other current assets	1,463	1,578
Total current assets	37,905	36,217
Property, plant and equipment, net	5,098	4,884
Right-of-use (ROU) assets	1,884	1,991
Investments	1,368	1,481
Deferred tax assets, net	4,116	4,116
Other assets	387	143
Total assets	50,758	48,832
Current liabilities:
Accounts payable	14,070	12,898
Accrued compensation and related taxes	1,573	1,143
Accrued warranty expense	669	591
Accrued other expenses and other current liabilities	411	700
Short-term lease liabilities	494	485
Credit facility	6,884	5,854
Notes payable-current portion	279	277
Deferred revenue	1,029	1,022
Total current liabilities	25,409	22,970
Notes payable, net of current portion	258	329
Long-term lease liabilities	1,657	1,785
Deferred revenue	4,427	3,613
Total liabilities	31,751	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; 50,000,000 authorized shares; 18,448,587 and 18,434,697 issued and 16,998,187 and 16,984,297 outstanding shares at March 31, 2023 and December 31, 2022, respectively	11,069	11,061
Additional paid-in capital	36,589	36,455
Accumulated deficit	(23,249)	(21,979)
Treasury stock, at cost, 1,450,400 shares at March 31, 2023, and December 31, 2022, respectively	(5,402)	(5,402)
Total stockholders' equity	19,007	20,135
Total liabilities and stockholders' equity	$ 50,758	$ 48,832