Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 34,733	$ 33,021
Trade accounts receivable, less allowance for doubtful accounts of $200 and $169, respectively	13,343	10,864
Unbilled revenue	1,463	1,546
Prepaid expenses	2,310	1,585
Income taxes receivable	375	14
Other current assets	35	35
Total current assets	52,259	47,065
Net property and equipment	12,359	11,806
Intangible assets, net	2,764	3,124
Goodwill	58,021	57,861
Other	1,913	768
Total assets	127,316	120,624
Current liabilities:
Current portion of notes payable	1,067	2,683
Accounts payable	593	765
Accrued wages, bonus and profit sharing	6,597	4,543
Accrued expenses	2,882	3,069
Current portion of capital lease obligations	71	82
Income taxes payable		662
Dividends payable	4,222	4,213
Deferred revenue	16,878	15,497
Total current liabilities	32,310	31,514
Notes payable, net of current portion		857
Deferred income taxes	4,030	4,670
Other long term liabilities	935	777
Total liabilities	37,275	37,818
Shareholders’ equity:
Preferred stock, $0.01 par value, authorized 2,000,000 shares, none issued	0	0
Additional paid-in capital	51,025	46,725
Retained earnings	77,574	71,507
Accumulated other comprehensive (loss) income, foreign currency translation adjustment	(1,635)	(2,626)
Treasury stock, at cost; 4,898,527 Class A shares, 784,018 Class B shares in 2017 and 4,765,691 Class A shares, 768,944 Class B shares in 2016	(36,953)	(32,830)
Total shareholders’ equity	90,041	82,806
Total liabilities and shareholders’ equity	127,316	120,624
Common Class A [Member]
Shareholders’ equity:
Common stock, value	26	26
Common Class B [Member]
Shareholders’ equity:
Common stock, value	$ 4	$ 4