CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets
Cash	$ 5,849	$ 6,726
Accounts receivable, net
Trade - billed (less allowance for credit losses of approximately $792 and $781, respectively), including contract retentions	16,842	16,223
Trade - unbilled	1,244	990
Inventories, net
Raw materials	1,965	1,776
Finished goods	2,243	2,042
Prepaid expenses	1,274	706
Refundable income taxes	476	477
Total current assets	29,893	28,940
Property and equipment, net	27,412	25,124
Other assets	349	249
Total assets	57,654	54,313
Current liabilities
Accounts payable - trade	5,476	5,816
Accrued expenses and other liabilities	1,182	799
Deferred revenues	2,153	2,243
Accrued compensation	774	788
Accrued income taxes	235	146
Operating lease liabilitiess	42	77
Current maturities of notes payable	627	618
Customer deposits	2,436	737
Total current liabilities	12,925	11,224
Deferred revenue	3,552	2,174
Operating lease liabilities	13	45
Notes payable - less current maturities	5,260	5,730
Deferred tax liability	2,086	2,085
Total liabilities	23,836	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; 5,348,189 and 5,345,189 issued and 5,257,413 and 5,256,413 outstanding, respectively	54	53
Additional paid-in capital	7,701	7,440
Treasury stock, at cost, 40,920 shares	(102)	(102)
Retained earnings	26,165	25,664
Total stockholders' equity	33,818	33,055
Total liabilities and stockholders' equity	$ 57,654	$ 54,313