Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue:
Revenue	$ 814	$ 2,024	$ 2,068	$ 7,844
Cost of revenue:
Cost of revenue	1,423	3,446	4,573	9,849
Gross loss	(609)	(1,422)	(2,505)	(2,005)
Operating Expenses:
Research and development	4,673	5,884	12,867	17,834
Sales and marketing	3,136	6,883	10,291	22,425
General and administrative	3,462	5,908	10,426	14,959
Amortization of intangible assets	2,780	2,558	7,964	7,754
Change in fair value of contingent consideration	502	(11,647)	1,770	(9,689)
Restructuring and other charges	0	0	858	0
Goodwill impairment	0	78,969	0	78,969
Intangible assets impairment	0	7,912	0	7,912
Loss from sale of SurgiBot assets, net	0	0	0	97
Acquisition related costs	0	(40)	0	5
Total Operating Expenses	14,553	96,427	44,176	140,266
Operating Loss	(15,162)	(97,849)	(46,681)	(142,271)
Other Income (Expense):
Change in fair value of warrant liabilities	63	614	(206)	3,036
Interest income	3	63	34	559
Interest expense	0	(1,230)	0	(3,407)
Other income (expense), net	16	(439)	(54)	(935)
Total Other Income (Expense), net	82	(992)	(226)	(747)
Loss before income taxes	(15,080)	(98,841)	(46,907)	(143,018)
Income tax (expense) benefit	(2)	1,070	1,386	2,549
Net loss	(15,082)	(97,771)	(45,521)	(140,469)
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	0	0	(299)	0
Net loss attributable to common stockholders	(15,082)	(97,771)	(46,232)	(140,469)
Comprehensive loss:
Net loss	(15,082)	(97,771)	(45,521)	(140,469)
Foreign currency translation gain (loss)	2,101	(3,670)	2,191	(4,379)
Comprehensive loss	$ (12,981)	$ (101,441)	$ (43,330)	$ (144,848)
Net loss per common share attributable to common stockholders - basic (in dollars per share)	$ (0.15)	$ (5.55)	$ (0.77)	$ (8.26)
Net loss per common share attributable to common stockholders - diluted (in dollars per share)	$ (0.15)	$ (5.55)	$ (0.77)	$ (8.34)
Weighted average number of shares used in computing net loss per common share - basic (in shares)	97,538	17,629	59,737	17,015
Weighted average number of shares used in computing net loss per common share - diluted (in shares)	97,538	17,741	59,737	17,208
Product [Member]
Revenue:
Revenue	$ 436	$ 1,649	$ 992	$ 6,820
Cost of revenue:
Cost of revenue	720	2,399	2,353	6,628
Service [Member]
Revenue:
Revenue	378	375	1,076	1,024
Cost of revenue:
Cost of revenue	$ 703	$ 1,047	$ 2,220	$ 3,221