Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Net income	$ 3,480,000	$ 5,453,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,015,000	935,000
Deferred income taxes	(63,000)	96,000
Reserve for uncertain tax positions	13,000
Write-off of purchase option	657,000
Non-cash share-based compensation expense (benefit)	184,000	(112,000)
Tax benefit from exercise of stock options	14,000	72,000
Net changes in assets and liabilities:
Trade accounts receivable	(3,838,000)	(1,075,000)
Unbilled revenue	(177,000)	(3,000)
Prepaid expenses and other	(374,000)	(481,000)
Accounts payable	(141,000)	43,000
Accrued expenses, wages, bonuses and profit sharing	67,000	(632,000)
Income taxes receivable and payable	378,000	31,000
Deferred revenue	363,000	836,000
Net cash provided by operating activities	1,578,000	5,163,000
Cash flows from investing activities:
Purchases of property and equipment	(757,000)	(605,000)
Net cash used in investing activities	(757,000)	(605,000)
Cash flows from financing activities:
Payments on notes payable	(576,000)	(558,000)
Payments on capital lease obligations	(50,000)	(29,000)
Proceeds from exercise of stock options		408,000
Common stock withheld from vested restricted shares for payroll tax withholdings	(92,000)	(309,000)
Excess tax benefit from share-based compensation	94,000	528,000
Payment of dividends on common stock	(2,511,000)
Net cash provided by (used in) financing activities	(3,135,000)	40,000
Effect of exchange rate changes on cash	(718,000)	(237,000)
Increase (decrease) in cash and cash equivalents	(3,032,000)	4,361,000
Cash and cash equivalents at beginning of period	40,042,000	22,092,000
Cash and cash equivalents at end of period	37,010,000	26,453,000
Supplemental disclosure of cash paid for:
Interest, net of capitalized amounts	59,000	76,000
Income taxes	$ 1,893,000	$ 2,219,000