Quarterly Results of Operation (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Summary of Unaudited Quarterly Results of Operations

The following is a summary of the Company’s unaudited quarterly results of operations for the fiscal years ended December 31, 2018 and 2017 (in thousands, except per share amounts):

	Fiscal Year Ended December 31, 2018
	1st			2nd			3rd			4th			Total
	Quarter			Quarter			Quarter			Quarter			Year
Total revenues	$	4,767		$	6,389		$	5,422		$	7,524		$	24,102
Cost of revenue		2,555			3,732			4,249			5,635			16,171
Gross profit		2,212			2,657			1,173			1,889			7,931
Amortization of intangible assets		2,827			2,743			2,674			2,624			10,868
Change in fair value of contingent consideration		627			812			(1,358	)		(1,092	)		(1,011	)
Acquisition related costs		—			—			345			302			647
Gain from sale of SurgiBot assets, net		(11,996	)		37			44			75			(11,840	)
Other operating expenses		13,911			14,954			14,343			18,205			61,413
Change in fair value of warrant liabilities		(1,829	)		17,507			8,760			(10,118	)		14,320
Reversal of transfer fee accrual		—			—			(2,994	)		—			(2,994	)
Interest income, interest expense and other expense		444			1,735			346			(843	)		1,682
Loss before income taxes		(1,772	)		(35,131	)		(20,987	)		(7,264	)		(65,154	)
Income tax benefit		890			883			781			823			3,377
Net loss	$	(882	)	$	(34,248	)	$	(20,206	)	$	(6,441	)	$	(61,777	)
Net loss per share - basic and diluted	$	0.00		$	(0.17	)	$	(0.10	)	$	(0.03	)	$	(0.30	)

	Fiscal Year Ended December 31, 2017
	1st			2nd			3rd			4th			Total
	Quarter			Quarter			Quarter			Quarter			Year
Total revenues	$	1,946		$	1,584		$	183			3,398		$	7,111
Cost of revenue		1,334			972			921			3,500			6,727
Gross profit (loss)		612			612			(738	)		(102	)		384
Amortization of intangible assets		1,636			1,687			1,821			2,714			7,858
Change in fair value of contingent consideration		1,227			(774	)		773			800			2,026
Issuance costs for warrants		—			627			—			—			627
Other operating expenses		13,627			11,538			12,337			14,298			51,800
Change in fair value of warrant liabilities		—			2,326			22,887			58,521			83,734
Interest income, interest expense and other expense		394			662			695			684			2,435
Loss before income taxes		(16,272	)		(15,454	)		(39,251	)		(77,119	)		(148,096	)
Income tax benefit		858			741			738			963			3,300
Net loss	$	(15,414	)	$	(14,713	)	$	(38,513	)	$	(76,156	)	$	(144,796	)
Net loss per share - basic and diluted	$	(0.13	)	$	(0.11	)	$	(0.26	)	$	(0.40	)	$	(0.97	)