Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets
Cash	$ 9,175	$ 6,726
Accounts receivable, net
Trade - billed (less allowances of $806 and $781), including contract retentions	17,209	16,223
Trade - unbilled	525	990
Inventories, net
Raw materials	2,329	1,776
Finished goods	2,821	2,042
Prepaid expenses	1,266	706
Refundable income taxes	0	477
Total current assets	33,325	28,940
Property and equipment, net	27,680	25,124
Other assets	343	249
Total assets	61,348	54,313
Current liabilities
Accounts payable - trade	7,336	5,816
Accrued expenses and other liabilities	831	799
Deferred revenue	2,717	2,243
Accrued compensation	1,203	788
Accrued income tax	473	146
Operating lease liabilities	43	77
Current maturities of notes payable	636	618
Customer deposits	2,779	737
Total current liabilities	16,018	11,224
Deferred revenue	4,424	2,174
Operating lease liabilities	2	45
Notes payable - less current maturities	5,092	5,730
Deferred tax liability	1,651	2,085
Total liabilities	27,187	21,258
Stockholders' equity
Preferred stock, $.01 par value; authorized 1,000,000 shares, none issued and outstanding	0	0
Common stock, $.01 par value; authorized 8,000,000 shares; 5,349,599 and 5,345,189 issued and 5,308,679 and 5,304,269 outstanding, respectively	54	53
Additional paid-in capital	7,814	7,440
Treasury stock, at cost, 40,920 shares	(102)	(102)
Retained earnings	26,395	25,664
Total stockholders' equity	34,161	33,055
Total liabilities and stockholders' equity	$ 61,348	$ 54,313