CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets
Cash	$ 4,727	$ 6,726
Accounts receivable, net
Trade - billed (less allowance for credit losses of approximately $912 and $781, respectively), including contract retentions	16,554	16,223
Trade - unbilled	653	990
Inventories, net
Raw materials	2,396	1,776
Finished goods	2,356	2,042
Prepaid expenses	1,212	706
Refundable income taxes	577	477
Total current assets	28,475	28,940
Property and equipment, net	26,886	25,124
Other assets	356	249
Total assets	55,717	54,313
Current liabilities
Accounts payable - trade	5,684	5,816
Accrued expenses and other liabilities	874	799
Deferred revenue, current	1,991	2,243
Accrued compensation	792	788
Accrued income taxes	0	146
Operating lease liabilities, current	51	77
Current maturities of notes payable	629	618
Customer deposits	2,985	737
Total current liabilities	13,006	11,224
Deferred revenue, non-currecnt	2,633	2,174
Operating lease liabilities non-current	24	45
Notes payable - less current maturities	5,412	5,730
Deferred tax liability	2,181	2,085
Total liabilities	23,256	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; 5,345,189 and 5,345,189 issued and 5,256,413 and 5,256,413 outstanding, respectively	53	53
Additional paid-in capital	7,611	7,440
Treasury stock, at cost, 40,920 shares	(102)	(102)
Retained earnings	24,899	25,664
Total stockholders' equity	32,461	33,055
Total liabilities and stockholders' equity	$ 55,717	$ 54,313