Unaudited Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Revenue	$ 2,646	$ 686	$ 5,376	$ 4,760
Cost and expense
Cost of revenue (excluding depreciation and amortization)	1,679	189	2,910	3,323
Sales and marketing	417	736	1,319	2,282
Technology and development	738	752	2,863	2,910
General and administrative	2,380	3,052	7,018	8,483
Depreciation and amortization	72	229	228	814
Impairments	463	0	463	0
Other operating expense	0	0	0	6
Total cost and expense	5,749	4,958	14,801	17,818
Operating loss	(3,103)	(4,272)	(9,425)	(13,058)
Other income (expense)
Interest expense	(60)	(457)	(1,296)	(1,397)
Other income, net	(58)	(24)	(1)	23
Change in fair value of warrant liability	5,570	(160)	(633)	502
Gain on lease termination	2,044	0	3,582	0
Other loss, net	21	(28)	(52)	(27)
Total other income (expense), net	7,517	(669)	1,600	(899)
Income (loss) from continuing operations	4,414	(4,941)	(7,825)	(13,957)
Loss from discontinued operations, net of tax	0	0	0	(2,610)
Net income (loss)	4,414	(4,941)	(7,825)	(16,567)
Other comprehensive income (loss)
Foreign currency translation adjustments	65	(289)	403	(256)
Comprehensive income (loss)	$ 4,479	$ (5,230)	$ (7,422)	$ (16,823)
Weighted-average shares outstanding, basic and diluted (in shares)	99,450	46,282	80,903	43,085
Net loss per share, basic and diluted
Continuing operations (usd per share)	$ 0.04	$ (0.11)	$ (0.10)	$ (0.32)
Discontinued operations (usd per share)	0	0	0	(0.06)
Consolidated (usd per share)	$ 0.04	$ (0.11)	$ (0.10)	$ (0.38)