Unaudited Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenue	$ 431	$ 1,209
Cost and expense
Cost of revenue (excluding depreciation and amortization)	21	1,593
Sales and marketing	416	859
Technology and development	648	1,304
General and administrative	2,740	2,977
Depreciation and amortization	90	325
Other operating expense	0	6
Total cost and expense	3,915	7,064
Operating loss	(3,484)	(5,855)
Other income (expense)
Interest expense	(461)	(387)
Other income (expense), net	0	(45)
Change in fair value of warrant liability	57	(1,416)
Gain on lease termination	1,538	0
Other loss, net	(73)	(26)
Total other income (expense), net	1,061	(1,874)
Loss from continuing operations before income taxes	(2,423)	(7,729)
Benefit from income taxes	0	0
Loss from continuing operations	(2,423)	(7,729)
Loss from discontinued operations, net of tax (Note 17)	0	(1,123)
Net loss	(2,423)	(8,852)
Other comprehensive income (loss)
Foreign currency translation adjustments	182	(94)
Comprehensive loss	$ (2,241)	$ (8,946)
Weighted-average shares outstanding, basic and diluted (in shares)	53,775	39,258
Net loss per share, basic and diluted
Continuing operations (usd per share)	$ (0.05)	$ (0.20)
Discontinued operations (usd per share)	0	(0.03)
Consolidated (usd per share)	$ (0.05)	$ (0.23)