Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue:
Revenue	$ 14,789	$ 11,679
Cost of revenue:
Cost of goods and services sold	4,228	3,759
Gross profit	10,561	7,920
Operating expenses:
Research and development	2,324	2,366
Sales and marketing	6,279	7,151
General and administrative	5,208	5,560
Settlement expense	99	207
Total operating expenses	13,910	15,284
Operating loss from continuing operations	(3,349)	(7,364)
Other expense:
Interest income (expense), net	1,200	(604)
Foreign exchange losses	(884)	(103)
Other expense		(52)
Loss from continuing operations before income taxes	(3,033)	(8,123)
Income tax benefit (expense) from continuing operations	1,537	(63)
Loss from continuing operations	(1,496)	(8,186)
Discontinued operations:
Loss from discontinued operations before income taxes		(2,140)
Income tax expense
Loss from discontinued operations		(2,140)
Net loss	$ (1,496)	$ (10,326)
Net loss per ordinary share—basic and diluted:
Loss from continuing operations (in dollars per share)	$ (0.06)	$ (0.32)
Loss from discontinued operations (in dollars per share)		(0.08)
Net loss (in dollars per share)	$ (0.06)	$ (0.40)
Weighted-average shares used to compute net loss per ordinary share—basic and diluted (in shares)	26,515,871	25,718,910
Product [Member]
Revenue:
Revenue	$ 13,841	$ 10,129
Cost of revenue:
Cost of goods and services sold	3,915	2,652
Service [Member]
Revenue:
Revenue	948	1,550
Cost of revenue:
Cost of goods and services sold	$ 313	$ 1,107