Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities
Net (loss) income	$ (118,685)	$ (38,329)	$ 76,544
Income from discontinued operations, net of taxes	0	40	96,383
Loss from continuing operations	(118,685)	(38,369)	(19,839)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	16,520	16,279	20,372
Goodwill impairment	59,775	0	8,264
Deferred income taxes	(2,358)	63	(743)
Bad debt expense and other reserves	718	528	2,984
Stock-based compensation	17,681	20,395	23,077
Changes in fair value	359	41	182
Amortization of lease right-of-use assets	3,940	4,295	5,408
(Gain) loss from equity method investment	(1,845)	5,404	1,989
Impairment of right-of-use assets and write-off and net loss on disposal of finite-lived assets	0	1,682	2,436
Other noncash expenses	230	408	0
Changes in operating assets and liabilities:
Accounts receivable	2,210	15,685	2,332
Prepaid expenses and other assets	(210)	2,733	1,297
Accounts payable	(2,750)	(1,806)	(8,221)
Accrued employee expenses	1,863	(1,754)	357
Operating lease liabilities	(5,214)	(5,192)	(6,257)
Accrued expenses and other current liabilities	(1,371)	(5,630)	(4,128)
Other liabilities	0	(388)	388
Net cash (used in) provided by operating activities - continuing operations	(29,137)	14,374	29,898
Net cash (used in) provided by operating activities - discontinued operations	0	(180)	9,219
Net cash (used in) provided by operating activities	(29,137)	14,194	39,117
Cash flows from investing activities
Purchase of property and equipment	(11,680)	(10,689)	(10,277)
Initial cash consideration	15,745	0
Cash paid for acquisition, net of cash acquired	(12,093)	0	0
Net cash used in investing activities - continuing operations	(8,028)	(10,689)	(10,277)
Net cash provided by investing activities - discontinued operations	0	6,484	112,178
Net cash (used in) provided by investing activities	(8,028)	(4,205)	101,901
Cash flows from financing activities
Payment of contingent consideration liability	0	(2,214)	(2,263)
Proceeds from exercise of common stock options	179	1,391	97
Taxes paid related to net share settlement of equity awards	(2,930)	(5,320)	(4,251)
Payments for the repurchase of common stock	(29,783)	(31,943)	(42,821)
Net cash used in financing activities	(32,534)	(38,086)	(49,238)
Net (decrease) increase in cash and cash equivalents	(69,699)	(28,097)	91,780
Cash and cash equivalents at beginning of year	245,217	273,314	181,534
Cash and cash equivalents at end of year	175,518	245,217	273,314
Supplemental disclosure of cash flow information
Income taxes	(131)	1,554	43
Supplemental disclosures of non-cash activities
Stock-based compensation capitalized for software development	1,019	1,296	1,322
Capitalized assets included in accounts payable, accrued employee expenses and other accrued expenses	1,311	1,239	643
Capitalized asset retirement costs included in property and equipment	0	0	498
Changes in right-of-use assets for operating lease obligations	3,047	0	0
Changes in lease liabilities for operating lease obligations	$ 3,636	$ 0	$ 0