Discontinued Operations - Income Statement (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations before income taxes		$ (33,160)	$ (5,126)	$ (3,540)
Basic and diluted net loss per common share (in dollars per share)		$ (0.47)	$ (0.07)	$ (0.06)
Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues		$ 48,877	$ 51,346	$ 64,290
Total cost of revenues		42,950	49,241	55,931
Gross profit		5,927	2,105	8,359
Product development		2,194	2,752	6,100
Sales and marketing		1,444	2,357	3,158
General and administrative		1,835	2,045	2,502
Income / (loss) from operations		454	(5,049)	(3,401)
Loss on impairment of goodwill	$ (34,045)	(34,045)	0	0
Interest and other income (expense), net		431	(77)	(139)
Loss from discontinued operations before income taxes		(33,160)	(5,126)	(3,540)
Income tax provision		0	0	0
Net loss from discontinued operations, net of taxes		(33,160)	(5,126)	(3,540)
Foreign currency translation adjustment		0	0	0
Comprehensive loss		$ (33,160)	$ (5,126)	$ (3,540)
Basic and diluted net loss per common share (in dollars per share)		$ (0.47)	$ (0.07)	$ (0.06)
Weighted-average common shares outstanding, basic and diluted	70,263	70,263	66,511	61,763