Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
OPERATING ACTIVITIES:
Net income	$ 6,232	$ 13,168
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	27,443	22,005
Stock based compensation	2,260	1,665
Amortization of deferred commissions	6,900	6,555
Provision for doubtful accounts	99	160
Deferred income taxes	2,066	2,330
Loss on non-marketable equity investments	258	8
Non-cash paid time off expense	(1,011)	0
Non-cash royalty expense	0	(3,440)
Change in fair value of non-marketable equity investments	0	(1,181)
Other	132	321
Changes in operating assets and liabilities:
Accounts and unbilled receivables	(13,907)	9
Prepaid royalties	(162)	1,394
Other prepaid expenses and other current assets	1,335	972
Deferred commissions	(9,854)	(6,693)
Other assets	(278)	308
Accounts payable and accrued expenses	(3,062)	(450)
Accrued royalties	(3,606)	(3,218)
Deferred revenue	(6,223)	(3,142)
Net cash provided by operating activities	36,436	30,753
INVESTING ACTIVITIES:
Business combinations, net of cash acquired	(731)	(21,449)
Proceeds from maturities of marketable securities	9,931	59,522
Purchases of marketable securities	(5,223)	(61,178)
Payments to acquire non-marketable equity investments	0	(1,257)
Payments to acquire equity method investments	(1,750)	0
Payments associated with capitalized software development	(16,577)	(12,366)
Purchases of property and equipment	(2,602)	(1,734)
Net cash used in investing activities	(16,952)	(38,462)
FINANCING ACTIVITIES:
Taxes paid related to net settlement of equity awards	(471)	(429)
Repurchases of common stock	0	(16,352)
Payment of cash dividends	(19)	(40)
Net cash used in financing activities	(490)	(16,821)
Effect of exchange rate changes on cash and cash equivalents	(101)	(1)
Net increase (decrease) in cash and cash equivalents	18,893	(24,531)
Cash and cash equivalents at beginning of period	36,566	131,538
Cash and cash equivalents at end of period	55,459	107,007
SUPPLEMENTAL CASH FLOW INFORMATION:
Non-cash additions to non-marketable equity investments	$ 0	$ 1,300