Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
OPERATING ACTIVITIES:
Net income	$ 4,732	$ 10,533
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	18,302	14,599
Stock based compensation	1,398	1,107
Amortization of deferred commissions	4,509	4,254
Provision for doubtful accounts	3	351
Deferred income taxes	1,751	2,427
Loss on non-marketable equity investments	133	50
Non-cash paid time off expense	(1,011)
Non-cash royalty expense		(3,440)
Change in fair value of non-marketable equity investments		(1,181)
Other	60	121
Changes in operating assets and liabilities:
Accounts and unbilled receivables	12,247	(3,759)
Prepaid royalties	(1,032)	576
Other prepaid expenses and other current assets	590	547
Deferred commissions	(6,612)	(3,634)
Other assets	(168)	505
Accounts payable and accrued expenses	(6,041)	(5,167)
Accrued royalties	(2,798)	(4,588)
Deferred revenue	(1,739)	231
Net cash provided by operating activities	24,324	13,532
INVESTING ACTIVITIES:
Business combinations, net of cash acquired	(731)	(21,449)
Proceeds from maturities of marketable securities	9,731	46,183
Purchases of marketable securities	(5,205)	(36,942)
Payments to acquire non-marketable equity investments		(1,000)
Payments to acquire equity method investments	(1,750)
Payments associated with capitalized software development	(10,277)	(7,619)
Purchases of property and equipment	(2,407)	(1,268)
Net cash used in investing activities	(10,639)	(22,095)
FINANCING ACTIVITIES:
Taxes paid related to net settlement of equity awards	(399)	(373)
Repurchases of common stock		(10,009)
Payment of cash dividends	(12)	(31)
Net cash used in financing activities	(411)	(10,413)
Effect of exchange rate changes on cash and cash equivalents	(48)	(28)
Net increase (decrease) in cash and cash equivalents	13,226	(19,004)
Cash and cash equivalents at beginning of period	36,566	131,538
Cash and cash equivalents at end of period	$ 49,792	112,534
SUPPLEMENTAL CASH FLOW INFORMATION:
Non-cash additions to non-marketable equity investments		$ 1,300