Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current Assets
Cash and cash equivalents	$ 41,748	$ 91,217
Short-term investments	39,670
Accounts receivable, net	5,669	1,536
Inventories	10,242	10,817
Interest receivable	51	80
Other current assets	9,039	9,344
Total Current Assets	106,419	112,994
Restricted cash	663	6,389
Property and equipment, net	6,659	6,670
Goodwill	70,669	71,368
Other long term assets	224	192
Total Assets	227,559	250,251
Current Liabilities
Accounts payable	2,785	3,771
Accrued expenses	7,432	10,974
Deferred revenue - current portion	1,270	1,088
Deferred gain from sale of SurgiBot assets		7,500
Contingent consideration – current portion	555	719
Notes payable - current portion, net of debt discount		4,788
Total Current Liabilities	12,042	28,840
Long Term Liabilities
Deferred revenue - less current portion	131
Contingent consideration – less current portion	11,549	11,699
Notes payable - less current portion, net of debt discount	19,106	8,385
Warrant liabilities	15,044	14,090
Net deferred tax liabilities	5,624	8,389
Total Liabilities	63,496	71,403
Commitments and Contingencies (Note 18)
Stockholders’ Equity
Common stock $0.001 par value, 750,000,000 shares authorized at September 30, 2018 and December 31, 2017; 212,631,801 and 199,282,003 shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively	212	199
Additional paid-in capital	664,439	621,261
Accumulated deficit	(502,965)	(447,640)
Accumulated other comprehensive income	2,377	5,028
Total Stockholders’ Equity	164,063	178,848
Total Liabilities and Stockholders’ Equity	227,559	250,251
Intellectual Property, Net [Member]
Current Assets
Intangible assets	$ 42,925	$ 52,638