Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Statement of Cash Flows [Abstract]
Net loss	$ (23,433)	$ (15,701)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	(168)
Net loss from continuing operations	(23,433)	(15,533)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	7,445	8,903
Deferred income taxes	(2,524)	50
Bad debt expense and other reserves	178	468
Stock-based compensation	7,985	11,542
Increase in the fair value of contingent consideration liability	0	41
Amortization of lease right-of-use assets	2,156	2,142
(Gain) loss from equity method investment	(1,845)	686
Impairment of right-of-use assets and write-off and loss on disposal of finite-lived assets	0	1,666
Other noncash (gain) expense	(258)	219
Changes in operating assets and liabilities:
Accounts receivable	1,970	9,620
Prepaid expenses and other assets	(1,650)	(1,416)
Accounts payable	(1,153)	3,250
Accrued employee expenses	303	(1,171)
Operating lease liabilities	(2,877)	(2,551)
Accrued expenses and other current liabilities	153	(2,394)
Other liabilities	0	(366)
Net cash (used in) provided by operating activities - continuing operations	(13,550)	15,156
Net cash used in operating activities - discontinued operations	0	(168)
Net cash (used in) provided by operating activities	(13,550)	14,988
Cash flows from investing activities
Purchase of property and equipment	(5,880)	(5,410)
Proceeds from Sale of Equity Method Investments	12,800	0
Cash paid	(12,093)	0
Net cash used in investing activities - continuing operations	(5,173)	(5,410)
Net cash provided by investing activities - discontinued operations	0	7,500
Net cash (used in) provided by investing activities	(5,173)	2,090
Cash flows from financing activities
Payment for Contingent Consideration Liability, Financing Activities	0	(2,214)
Proceeds from exercise of common stock options	179	1,344
Taxes paid related to net share settlement of equity awards	(1,889)	(3,049)
Payments for the repurchase of common stock	(25,103)	(19,400)
Net cash used in financing activities	(26,813)	(23,319)
Net decrease in cash and cash equivalents	(45,536)	(6,241)
Cash and cash equivalents at beginning of period	199,681	267,073
Cash and cash equivalents at end of period	245,217	273,314
Supplemental disclosures of non-cash activities
Stock-based compensation capitalized for software development	536	697
Capitalized assets included in accounts payable, accrued employee expenses and other accrued expenses	780	850
Changes in right-of-use assets for operating lease obligations	3,047	0
Changes in lease liabilities for operating lease obligations	$ 3,636	$ 0