Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 2,687	$ 3,390
Investment securities, available-for-sale, at fair value	1,094	1,098
Accounts receivable, net
Trade - billed (less allowance for doubtful accounts of $246 and $208)	10,091	8,967
Trade - unbilled	496	251
Inventories
Raw materials	879	819
Finished goods	2,383	2,696
Prepaid expenses and other assets	533	452
Refundable income taxes	1,325	1,359
Total current assets	19,488	19,032
Property and equipment, net	10,876	9,867
Operating lease, net	4,321	0
Other assets	255	326
Total assets	34,940	29,225
Current liabilities
Accounts payable - trade	2,385	3,059
Accrued expenses and other liabilities	525	588
Deferred revenue	1,229	1,144
Accrued compensation	822	1,231
Income taxes payable	338	0
Dividend payable	0	256
Current maturities of notes payable	659	637
Customer deposits	1,415	919
Total current liabilities	7,373	7,834
Deferred buy-back lease	5,389	0
Notes payable - less current maturities	2,744	2,896
Deferred tax liability	1,194	1,290
Total liabilities	16,700	12,020
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; 5,225,648 and 5,214,148 issued and 5,080,395 and 5,047,895 outstanding, respectively	52	51
Additional paid-in capital	5,986	5,719
Treasury stock, at cost, 40,920 shares	(102)	(102)
Accumulated other comprehensive loss, net	(41)	(19)
Retained earnings	12,345	11,556
Total stockholders’ equity	18,240	17,205
Total liabilities and stockholders' equity	$ 34,940	$ 29,225