Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income	$ 9,232,000	$ 11,755,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and impairment	1,984,000	1,371,000
Deferred income taxes	140,000	348,000
Reserve for uncertain tax positions	67,000	80,000
Non-cash share-based compensation expense	(54,000)	332,000
Net changes in assets and liabilities:
Trade accounts receivable	(209,000)	(5,886,000)
Prepaid expenses and other current assets	(306,000)	(165,000)
Insurance receivable		(2,771,000)
Deferred contract costs, net	(278,000)	(693,000)
Operating lease assets and liabilities, net	39,000	(4,000)
Accounts payable	(264,000)	(623,000)
Accrued expenses, wages and bonuses	142,000	(139,000)
Income taxes receivable and payable	2,130,000	(886,000)
Deferred revenue	1,785,000	2,804,000
Net cash provided by operating activities	14,408,000	5,523,000
Cash flows from investing activities:
Purchases of property and equipment	(1,238,000)	(590,000)
Acquisition consideration	(3,000,000)
Net cash used in investing activities	(4,238,000)	(590,000)
Cash flows from financing activities:
Payments on notes payable	(1,009,000)	(959,000)
Payments on finance lease obligations	(122,000)	(58,000)
Proceeds from the exercise of share-based awards	162,000	0
Payment of employee payroll tax withholdings on share-based awards exercised	(460,000)	(1,280,000)
Payment of dividends on common stock		(5,239,000)
Net cash used in financing activities	(1,429,000)	(7,536,000)
Effect of exchange rate changes on cash and cash equivalents	23,000	(893,000)
Change in cash and cash equivalents	8,764,000	(3,496,000)
Cash and cash equivalents at beginning of period	34,690,000	13,517,000
Cash and cash equivalents at end of period	43,454,000	10,021,000
Supplemental disclosure of cash paid for:
Interest expense, net of capitalized amounts	403,000	445,000
Income taxes	41,000	70,000
Supplemental disclosure of non-cash investing and financing activities:
Stock tendered to the Company for cashless exercise of stock options in connection with equity incentive plans	749,000	$ 3,145,000
Deferred acquisition consideration	$ 1,950,000