Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue:
Revenue	$ 655	$ 3,639	$ 1,255	$ 5,820
Cost of revenue:
Cost of revenue	1,413	3,936	3,151	6,403
Gross loss	(758)	(297)	(1,896)	(583)
Operating Expenses:
Research and development	4,257	6,295	8,191	11,950
Sales and marketing	2,901	7,868	7,154	15,542
General and administrative	3,619	4,489	6,968	9,049
Amortization of intangible assets	2,619	2,585	5,183	5,196
Change in fair value of contingent consideration	212	960	1,268	1,958
Restructuring and other charges	0	0	858	0
Acquisition related costs	0	0	0	45
Loss from sale of SurgiBot assets, net	0	0	0	97
Total Operating Expenses	13,608	22,197	29,622	43,837
Operating Loss	(14,366)	(22,494)	(31,518)	(44,420)
Other Income (Expense):
Change in fair value of warrant liabilities	(114)	2,528	(269)	2,422
Interest income	4	178	31	496
Interest expense	0	(1,061)	0	(2,177)
Other expense	(55)	(191)	(70)	(496)
Total Other Income (Expense), net	(165)	1,454	(308)	245
Loss before income taxes	(14,531)	(21,040)	(31,826)	(44,175)
Income tax benefit	691	869	1,388	1,479
Net loss	(13,840)	(20,171)	(30,438)	(42,696)
Deemed dividend related to beneficial conversion feature of preferred stock	0	0	(412)	0
Deemed dividend related to conversion of preferred stock into common stock	(299)	0	(299)	0
Net loss attributable to common stockholders	(14,139)	(20,171)	(31,149)	(42,696)
Comprehensive loss:
Net loss	(13,840)	(20,171)	(30,438)	(42,696)
Foreign currency translation gain (loss)	962	1,240	90	(709)
Comprehensive loss	$ (12,878)	$ (18,931)	$ (30,348)	$ (43,405)
Net loss per common share attributable to common stockholders - basic (in dollars per share)	$ (0.27)	$ (1.21)	$ (0.77)	$ (2.56)
Net loss per common share attributable to common stockholders - diluted (in dollars per share)	$ (0.27)	$ (1.35)	$ (0.77)	$ (2.68)
Weighted average number of shares used in computing net loss per common share - basic (in shares)	52,351	16,729	40,628	16,703
Weighted average number of shares used in computing net loss per common share - diluted (in shares)	52,351	16,814	40,628	16,814
Product [Member]
Revenue:
Revenue	$ 315	$ 3,342	$ 557	$ 5,171
Cost of revenue:
Cost of revenue	720	2,956	1,633	4,229
Service [Member]
Revenue:
Revenue	340	297	698	649
Cost of revenue:
Cost of revenue	$ 693	$ 980	$ 1,518	$ 2,174