Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current Assets
Cash and cash equivalents	$ 97,743	$ 91,217
Accounts receivable, net	2,210	1,536
Inventories	11,040	10,817
Interest receivable	104	80
Other current assets	7,243	9,344
Total Current Assets	118,340	112,994
Restricted cash	750	6,389
Property and equipment, net	6,676	6,670
Goodwill	70,813	71,368
Other long term assets	259	192
Total Assets	242,747	250,251
Current Liabilities
Accounts payable	4,108	3,771
Accrued expenses	10,270	10,974
Deferred revenue	1,083	1,088
Deferred gain from sale of SurgiBot assets		7,500
Contingent consideration – current portion	547	719
Notes payable - current portion, net of debt discount		4,788
Total Current Liabilities	16,008	28,840
Long Term Liabilities
Contingent consideration – less current portion	12,915	11,699
Notes payable - less current portion, net of debt discount	18,952	8,385
Warrant liabilities	22,708	14,090
Net deferred tax liabilities	6,446	8,389
Total Liabilities	77,029	71,403
Commitments and Contingencies (Note 18)
Stockholders’ Equity
Common stock $0.001 par value, 750,000,000 shares authorized at June 30, 2018 and December 31, 2017; 207,712,291 and 199,282,003 shares issued and outstanding at June 30, 2018 and December 31, 2017, respectively	207	199
Additional paid-in capital	645,332	621,261
Accumulated deficit	(482,759)	(447,640)
Accumulated other comprehensive income	2,938	5,028
Total Stockholders’ Equity	165,718	178,848
Total Liabilities and Stockholders’ Equity	242,747	250,251
Intellectual Property, Net [Member]
Current Assets
Intangible assets	$ 45,909	$ 52,638