Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net income	$ 20,518,000	$ 17,610,000	$ 18,156,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,225,000	4,109,000	3,804,000
Deferred income taxes	865,000	(1,361,000)	107,000
Reserve for uncertain tax positions	6,000	93,000	182,000
Loss on disposal of property and equipment	22,000		2,000
Gain on sale from operating segment	(223,000)	(1,102,000)
Write-off of purchase option		657,000
Tax benefit from exercise of stock options		25,000	93,000
Non-cash share-based compensation expense	1,929,000	1,383,000	742,000
Change in assets and liabilities, net of effect of acquisition and disposal:
Trade accounts receivable	(1,044,000)	(1,777,000)	2,914,000
Unbilled revenue	(93,000)	(390,000)	66,000
Prepaid expenses and other current assets	(535,000)	207,000	(2,000)
Accounts payable	(15,000)	(224,000)	163,000
Accrued expenses, wages, bonus and profit sharing	440,000	755,000	(367,000)
Income taxes receivable and payable	105,000	1,504,000	(715,000)
Deferred revenue	643,000	397,000	1,052,000
Net cash provided by operating activities	26,843,000	21,886,000	26,197,000
Cash flows from investing activities:
Purchases of property and equipment	(3,973,000)	(2,939,000)	(2,492,000)
Option purchase			(657,000)
Acquisition, net of cash acquired			(2,574,000)
Net proceeds from sale of operating segment	223,000	1,613,000
Net cash used in investing activities	(3,750,000)	(1,326,000)	(5,723,000)
Cash flows from financing activities:
Payments on notes payable	(2,199,000)	(2,328,000)	(2,256,000)
Payments on capital lease obligations	(95,000)	(173,000)	(156,000)
Cash paid for non-controlling interest	(2,000,000)	(2,789,000)
Proceeds from exercise of stock options	548,000	0	408,000
Excess tax benefit from share-based compensation		240,000	622,000
Repurchase of shares for payroll tax withholdings related to share-based compensation	(204,000)	(92,000)	(348,000)
Purchase of Treasury Stock		(1,673,000)
Payment of dividends on common stock	(28,552,000)	(10,054,000)
Net cash used in financing activities	(32,502,000)	(16,869,000)	(1,730,000)
Effect of exchange rate changes on cash	285,000	(1,588,000)	(794,000)
Net (decrease) increase in cash and cash equivalents	(9,124,000)	2,103,000	17,950,000
Cash and cash equivalents at beginning of period	42,145,000	40,042,000	22,092,000
Cash and cash equivalents at end of period	33,021,000	42,145,000	40,042,000
Supplemental disclosure of cash paid for:
Interest expense, net of $10, $14, and $10 capitalized, respectively	192,000	207,000	284,000
Income taxes	$ 9,963,000	$ 9,377,000	$ 9,874,000