Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income	$ 29,048	$ 23,708
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,623	4,285
Deferred income taxes	(134)	919
Reserve for uncertain tax positions	150	(262)
Non-cash share-based compensation expense	747	917
Gain on insurance recoveries for damaged property	(260)	0
Loss on disposal of property and equipment		40
Net changes in assets and liabilities:
Trade accounts receivable	(5,830)	(3,343)
Prepaid expenses and other current assets	(478)	978
Insurance recoverable	(913)	0
Deferred contract costs, net	(339)	(508)
Operating lease assets and liabilities, net	(5)	(10)
Accounts payable	(681)	69
Accrued expenses, wages, bonuses and profit sharing	473	138
Income taxes receivable and payable	(2,974)	(829)
Deferred revenue	992	2,872
Net cash provided by operating activities	24,419	28,974
Cash flows from investing activities:
Purchases of property and equipment	(2,435)	(3,429)
Insurance proceeds for damaged property	260	0
Net cash used in investing activities	(2,175)	(3,429)
Cash flows from financing activities:
Borrowings on line of credit		21,000
Payments on line of credit		(21,000)
Payments on notes payable	(2,575)	(2,767)
Payment of debt issuance costs	(36)	0
Payments on finance lease obligations	(187)	(223)
Proceeds from the exercise of stock options	1,592	0
Payment of employee payroll tax withholdings on share-based awards exercised	(1,859)	(1,021)
Payment of dividends on common stock	(10,517)	(26,564)
Net cash used in financing activities	(13,582)	(30,575)
Effect of exchange rate changes on cash	(324)	397
Change in cash and cash equivalents	8,338	(4,633)
Cash and cash equivalents at beginning of period	13,517	12,991
Cash and cash equivalents at end of period	21,855	8,358
Supplemental disclosure of cash paid for:
Interest, net of capitalized amounts	1,315	1,558
Income taxes	5,034	5,607
Supplemental disclosure of non-cash investing and financing activities:
Finance lease obligations originated for property and equipment	771	206
Stock tendered to the Company for cashless exercise of stock options in connection with equity incentive plans	$ 5,560	$ 2,295