CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets
Cash	$ 10,808	$ 13,492
Accounts receivable, net
Trade - billed (less allowance for doubtful accounts of approximately $438 and $437, respectively), including contract retentions	13,175	10,013
Trade - unbilled	278	439
Inventories, net
Raw materials	2,097	1,143
Finished goods	1,887	1,702
Prepaid expenses	622	551
Refundable income taxes	176	411
Total current assets	29,043	27,751
Property and equipment, net	24,165	21,926
Deferred buy-back lease asset, net	825	3,390
Other assets	244	258
Total assets	54,277	53,325
Current liabilities
Accounts payable - trade	4,577	2,071
Accrued expenses and other liabilities	427	657
Deferred revenue	2,006	2,454
Accrued compensation	592	1,036
Accrued income taxes	115	2,033
Deferred buy-back lease obligation	925	3,776
Operating lease liabilities	89	89
Current maturities of notes payable	619	468
Customer deposits	1,508	1,325
Total current liabilities	10,858	13,909
Deferred revenue	2,539	1,865
Operating lease liabilities	55	122
Notes payable - less current maturities	5,948	3,724
Deferred tax liability	1,953	1,955
Total liabilities	21,353	21,575
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; 5,353,095 and 5,353,095 issued and 5,230,658 and 5,229,658 outstanding, respectively	53	53
Additional paid-in capital	7,313	6,935
Treasury stock, at cost, 40,920 shares	(102)	(102)
Retained earnings	25,660	24,864
Total stockholders' equity	32,924	31,750
Total liabilities and stockholders' equity	$ 54,277	$ 53,325