Unaudited Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Revenue	$ 2,299	$ 2,865	$ 2,730	$ 4,074
Cost and expense
Cost of revenue (excluding depreciation and amortization)	1,210	1,541	1,231	3,134
Sales and marketing	486	687	902	1,546
Technology and development	1,477	854	2,125	2,158
General and administrative	1,898	2,454	4,638	5,431
Depreciation and amortization	66	260	156	585
Other operating expense	0	0	0	6
Total cost and expense	5,137	5,796	9,052	12,860
Operating loss	(2,838)	(2,931)	(6,322)	(8,786)
Other income (expense)
Interest expense	(775)	(553)	(1,236)	(940)
Other income, net	57	92	57	47
Change in fair value of warrant liability	(6,260)	2,078	(6,203)	662
Gain on lease termination	0	0	1,538	0
Other loss, net	0	27	(73)	1
Total other income (expense), net	(6,978)	1,644	(5,917)	(230)
Loss from continuing operations before income taxes	(9,816)	(1,287)	(12,239)	(9,016)
Benefit from income taxes	0	0	0	0
Loss from continuing operations	(9,816)	(1,287)	(12,239)	(9,016)
Loss from discontinued operations, net of tax (Note 17)	0	(1,487)	0	(2,610)
Net loss	(9,816)	(2,774)	(12,239)	(11,626)
Other comprehensive income (loss)
Foreign currency translation adjustments	156	127	338	33
Comprehensive loss	$ (9,660)	$ (2,647)	$ (11,901)	$ (11,593)
Weighted-average shares outstanding, basic and diluted (in shares)	89,264	43,335	71,527	39,994
Net loss per share, basic and diluted
Continuing operations (usd per share)	$ (0.11)	$ (0.03)	$ (0.17)	$ (0.23)
Discontinued operations (usd per share)	0	(0.03)	0	(0.07)
Consolidated (usd per share)	$ (0.11)	$ (0.06)	$ (0.17)	$ (0.30)