Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue:
Revenue	$ 21,219,000	$ 16,050,000	$ 55,596,000	$ 44,386,000
Cost of revenue:
Cost of goods and services sold	5,731,000	4,573,000	15,359,000	12,870,000
Gross profit	15,488,000	11,477,000	40,237,000	31,516,000
Operating expenses:
Research and development	1,631,000	1,754,000	6,044,000	5,969,000
Sales and marketing	7,405,000	6,432,000	21,169,000	20,655,000
General and administrative	5,531,000	8,132,000	16,230,000	19,349,000
Settlement expense	799,000	212,000	1,002,000	1,979,000
Total operating expenses	15,366,000	16,530,000	44,445,000	47,952,000
Operating income (loss) from continuing operations	122,000	(5,053,000)	(4,208,000)	(16,436,000)
Other income (expense):
Interest income (expense), net	1,064,000	(673,000)	3,426,000	(2,011,000)
Foreign exchange gains (losses)	360,000	(52,000)	(233,000)	(306,000)
Other income (expense)	23,000	5,000	65,000	(242,000)
Income (loss) from continuing operations before income taxes	1,569,000	(5,773,000)	(950,000)	(18,995,000)
Income tax benefit (expense) from continuing operations	(383,000)	(485,000)	1,230,000	(1,182,000)
Income (loss) from continuing operations	1,186,000	(6,258,000)	280,000	(20,177,000)
Discontinued operations:
Income (loss) from discontinued operations before income taxes	(469,000)	2,774,000	(469,000)	(104,000)
Income tax expense
Income (loss) from discontinued operations	(469,000)	2,774,000	(469,000)	(104,000)
Net income (loss)	$ 717,000	$ (3,484,000)	$ (189,000)	$ (20,281,000)
Net income (loss) per ordinary share - basic
Income (loss) from continuing operations (in dollars per share)	$ 0.04	$ (0.24)	$ 0.01	$ (0.78)
Income (loss) from discontinued operations (in dollars per share)	(0.02)	0.11	(0.02)
Net income (loss) (in dollars per share)	0.03	(0.13)	(0.01)	(0.78)
Net income (loss) per ordinary share - diluted:
Income (loss) from continuing operations (in dollars per share)	0.04	(0.24)	0.01	(0.78)
Income (loss) from discontinued operations (in dollars per share)	(0.02)	0.11	(0.02)
Net income (loss) (in dollars per share)	$ 0.03	$ (0.13)	$ (0.01)	$ (0.78)
Weighted-average shares used to compute net income (loss) per ordinary share - basic (in shares)	26,751,083	26,033,550	26,631,704	25,867,014
Weighted-average shares used to compute net income (loss) per ordinary share - diluted (in shares)	26,936,541	26,033,550	26,904,481	25,867,014
Product [Member]
Revenue:
Revenue	$ 20,115,000	$ 15,095,000	$ 52,622,000	$ 40,236,000
Cost of revenue:
Cost of goods and services sold	5,313,000	3,864,000	14,306,000	9,993,000
Service [Member]
Revenue:
Revenue	1,104,000	955,000	2,974,000	4,150,000
Cost of revenue:
Cost of goods and services sold	$ 418,000	$ 709,000	$ 1,053,000	$ 2,877,000