Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Schedule of Revenue Recognition (Details)

v3.21.1
Revenue Recognition - Schedule of Revenue Recognition (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Total revenues $ 4,030 $ 3,116 $ 12,829
Functional Neurosurgery Navigation and Therapy - Disposable Products      
Total revenues 1,917 1,742  
Biologics and Drug Delivery - Disposable Products      
Total revenues 914 173  
Biologics and Drug Delivery - Services      
Total revenues 746 856  
Biologics and Drug Delivery Revenue      
Total revenues 1,660 1,029  
Capital Equipment and Software - Systems and Software Products      
Total revenues 331 264  
Capital Equipment and Software - Services      
Total revenues 122 81  
Capital Equipment and Software Revenue      
Total revenues $ 453 $ 345