Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current Assets
Cash and cash equivalents	$ 87,634	$ 91,217
Accounts receivable, net	1,837	1,536
Inventories	11,644	10,817
Interest receivable	101	80
Other current assets	8,304	9,344
Total Current Assets	109,520	112,994
Restricted cash	6,779	6,389
Property and equipment, net	6,406	6,670
Goodwill	71,954	71,368
Other long term assets	283	192
Total Assets	246,175	250,251
Current Liabilities
Accounts payable	3,614	3,771
Accrued expenses	8,222	10,974
Deferred revenue	1,018	1,088
Deferred gain on sale of SurgiBot assets		7,500
Contingent consideration – current portion	760	719
Notes payable - current portion, net of debt discount	6,583	4,788
Total Current Liabilities	20,197	28,840
Long Term Liabilities
Contingent consideration – less current portion	12,285	11,699
Notes payable - less current portion, net of debt discount	6,863	8,385
Warrant liabilities	11,745	14,090
Net deferred tax liabilities	7,727	8,389
Total Liabilities	58,817	71,403
Commitments and Contingencies (Note 18)
Stockholders’ Equity
Common stock $0.001 par value, 750,000,000 shares authorized at March 31, 2018 and December 31, 2017; 201,972,831 and 199,282,003 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively	201	199
Additional paid-in capital	628,332	621,261
Accumulated deficit	(448,511)	(447,640)
Accumulated other comprehensive income	7,336	5,028
Total Stockholders’ Equity	187,358	178,848
Total Liabilities and Stockholders’ Equity	246,175	250,251
Intellectual Property, Net [Member]
Current Assets
Intangible assets	$ 51,233	$ 52,638