Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue:
Revenue	$ 16,050	$ 15,011	$ 44,386	$ 42,124
Cost of revenue:
Cost of goods and services sold	4,573	5,247	12,870	14,832
Gross profit	11,477	9,764	31,516	27,292
Operating expenses:
Research and development	1,754	2,931	5,969	8,092
Sales and marketing	6,432	7,257	20,655	22,175
General and administrative	8,132	7,066	19,349	19,456
Change in fair value of contingent purchase price consideration		(880)		(3,475)
Intangible assets impairment charge		11,064		11,064
Settlement expense	212	196	1,979	9,831
Total operating expenses	16,530	27,634	47,952	67,143
Operating loss from continuing operations	(5,053)	(17,870)	(16,436)	(39,851)
Other expense:
Interest expense, net	(673)	(781)	(2,011)	(2,411)
Foreign exchange losses	(52)	(624)	(306)	(1,277)
Other income (expense)	5		(242)	(262)
Loss from continuing operations before income taxes	(5,773)	(19,275)	(18,995)	(43,801)
Income tax expense from continuing operations	(485)	(222)	(1,182)	2,189
Loss from continuing operations	(6,258)	(19,497)	(20,177)	(41,612)
Discontinued operations:
Income (loss) from discontinued operations before income taxes	2,774	2,650	(104)	(73)
Income tax expense
Income (loss) from discontinued operations	2,774	2,650	(104)	(73)
Net loss	$ (3,484)	$ (16,847)	$ (20,281)	$ (41,685)
Net loss from continuing operations per ordinary share—basic and diluted (in dollars per share)	$ (0.24)	$ (0.81)	$ (0.78)	$ (1.80)
Net income (loss) from discontinued operations per ordinary share—basic and diluted (in dollars per share)	0.11	0.11	0	0
Net loss per ordinary share—basic and diluted (in dollars per share)	$ (0.13)	$ (0.70)	$ (0.78)	$ (1.80)
Weighted-average shares used to compute net loss per ordinary share—basic and diluted (in shares)	26,033,550	24,123,574	25,867,014	23,159,986
Product [Member]
Revenue:
Revenue	$ 15,095	$ 13,419	$ 40,236	$ 37,713
Cost of revenue:
Cost of goods and services sold	3,864	4,035	9,993	11,319
Service [Member]
Revenue:
Revenue	955	1,592	4,150	4,411
Cost of revenue:
Cost of goods and services sold	$ 709	$ 1,212	$ 2,877	$ 3,513