Consolidate Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets
Cash	$ 13,492	$ 8,764
Investment securities, available-for-sale, at fair value	0	1,228
Accounts receivable, net
Trade - billed (less allowance for doubtful accounts of $437 and $397), including contract retentions	10,013	9,798
Trade - unbilled	439	742
Inventories, net
Raw materials	1,143	643
Finished goods	1,702	1,551
Prepaid expenses	551	615
Refundable income taxes	411	0
Total current assets	27,751	23,341
Property and equipment, net	21,926	18,602
Deferred buy-back lease asset, net	3,390	4,237
Other assets	258	319
Total assets	53,325	46,499
Current liabilities
Accounts payable - trade	2,071	1,866
Accrued expenses and other liabilities	657	875
Deferred revenuecurrent	2,454	1,774
Accrued compensation	1,036	1,318
Accrued income tax	2,033	470
Deferred buy-back lease obligation	3,776	1,203
Operating lease liabilities	89	85
Current maturities of notes payable	468	740
Customer deposits	1,325	569
Total current liabilities	13,909	8,900
Deferred Revenue	1,865	600
Deferred buy-bacl lease obligation	0	3,790
Operating Lease Liability Noncurrent	122	211
Notes payable - less current maturities	3,724	4,196
PPP loan	0	2,692
Deferred tax liability	1,955	2,461
Total liabilities	21,575	22,850
Commitments and contingencies	0	0
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; 5,353,098 and 5,279,411 issued and 5,229,658 and 5,202,158 outstanding, respectively	53	52
Additional paid-in capital	6,935	6,405
Treasury stock, at cost, 40,920 shares	102	102
Retained earnings	24,864	17,294
Total stockholders' equity	31,750	23,649
Total liabilities and stockholders' equity	$ 53,325	$ 46,499