Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Statement of Cash Flows [Abstract]
Net loss	$ (10,322)	$ (46,077)
Income from discontinued operations, net of taxes	1,853	2,555
Net loss from continuing operations	(12,175)	(48,632)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	15,321	15,653
Goodwill impairment	8,264	0
Deferred income taxes	(341)	168
Bad debt expense and other reserves	2,805	827
Stock-based compensation	17,632	30,260
Increase in the fair value of contingent consideration liability	151	225
Amortization of lease right-of-use assets	4,312	4,437
Loss from equity method investment	1,460	737
Write-off and loss on disposal of fixed assets	39	1,109
Changes in operating assets and liabilities:
Accounts receivable	(5,289)	4,162
Prepaid expenses and other assets	774	(30,553)
Accounts payable	(8,189)	(4,763)
Accrued employee expenses	(851)	1,740
Operating lease liabilities	(5,065)	(5,125)
Accrued expenses and other liabilities	(4,599)	32,500
Other liabilities	1,823	(352)
Net cash provided by operating activities - continuing operations	16,072	2,393
Net cash provided by operating activities - discontinued operations	7,622	4,858
Net cash provided by operating activities	23,694	7,251
Cash flows from investing activities
Purchase of property and equipment	(8,020)	(7,359)
Cash paid for equity method investment	0	(23,174)
Net cash used in investing activities - continuing operations	(8,020)	(30,533)
Net cash used in investing activities - discontinued operations	(1,138)	(791)
Net cash used in investing activities	(9,158)	(31,324)
Cash flows from financing activities
Payment of contingent consideration liability	(2,263)	0
Proceeds from exercise of common stock options	84	2,857
Taxes paid related to net share settlement of equity awards	(3,084)	(2,449)
Payments for Repurchase of Common Stock	(12,108)	0
Net cash (used in) provided by financing activities	(17,371)	408
Cash and Cash Equivalents, Period Increase (Decrease)	(2,835)	(23,665)
Cash and cash equivalents at beginning of period	181,534	196,128
Cash and cash equivalents at end of period	178,699	172,463
Supplemental disclosures of non-cash activities
Stock-based compensation capitalized for software development	992	1,304
Capitalized assets included in accounts payable, accrued employee expenses and other accrued expenses	392	308
Capitalized asset retirement costs included in property and equipment	$ 498	$ 0