Annual report pursuant to Section 13 and 15(d)

Revenue Recognition - Schedule of Revenue Recognition (Details)

v3.21.1
Revenue Recognition - Schedule of Revenue Recognition (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Total revenues $ 12,829 $ 11,217
Functional Neurosurgery Navigation and Therapy - Disposable Products    
Total revenues 6,271 6,918
Functional Neurosurgery Navigation and Therapy - Services    
Total revenues 25 225
Functional Neurosurgery Navigation and Therapy    
Total revenues 6,296 7,143
Biologics and Drug Delivery - Disposable Products    
Total revenues 1,468 1,522
Biologics and Drug Delivery - Services    
Total revenues 3,575 890
Biologics and Drug Delivery Revenue    
Total revenues 5,043 2,412
Capital Equipment and Software - Systems and Software Products    
Total revenues 1,050 1,356
Capital Equipment and Software - Services    
Total revenues 440 306
Capital Equipment and Software Revenue    
Total revenues $ 1,490 $ 1,662