Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets
Cash	$ 1,946	$ 3,390
Investment securities, available-for-sale, at fair value	1,107	1,098
Accounts receivable, net
Trade - billed (less allowance for doubtful accounts of $214 and $208)	12,281	8,967
Trade - unbilled	1,313	251
Inventories, net
Raw materials	1,005	819
Finished goods	2,555	2,696
Prepaid expenses and other assets	480	452
Refundable income taxes	909	1,359
Total current assets	21,596	19,032
Property and equipment, net	14,102	9,867
Deferred buy-back lease asset, net	5,304	0
Other assets	367	326
Total assets	41,369	29,225
Current liabilities
Accounts payable - trade	4,212	3,059
Accrued expenses and other liabilities	610	588
Deferred revenue	1,683	1,144
Accrued compensation	1,556	1,231
Dividend payable	281	256
Line-of-credit construction draw	1,000	0
Current maturities of notes payable	711	637
Customer deposits	1,658	919
Total current liabilities	11,711	7,834
Deferred buy-back lease	6,592	0
Notes payable - less current maturities	2,792	2,896
Deferred tax liability	1,427	1,290
Total liabilities	22,522	12,020
Commitments and contingencies
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; 5,223,245 and 5,214,148 issued and 5,112,825 and 5,047,895 outstanding, respectively	51	51
Additional paid-in capital	5,973	5,719
Treasury stock, at cost, 40,920 shares	(102)	(102)
Accumulated other comprehensive loss	(37)	(19)
Retained earnings	12,962	11,556
Total stockholders' equity	18,847	17,205
Total liabilities and stockholders' equity	$ 41,369	$ 29,225