Annual report pursuant to Section 13 and 15(d)

Entity Level Information - Additional Information (Details)

v3.20.1
Entity Level Information - Additional Information (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
Segment
Dec. 31, 2018
USD ($)
Revenues From External Customers And Long Lived Assets [Line Items]    
Number of reporting segment | Segment 1  
Allowance for credit losses $ 52 $ 11
Receivables | Customer Concentration | Customer One    
Revenues From External Customers And Long Lived Assets [Line Items]    
Concentration risk percentage 40.00% 44.00%
Receivables | Customer Concentration | Customer Two    
Revenues From External Customers And Long Lived Assets [Line Items]    
Concentration risk percentage 28.00% 43.00%
U.S [Member]    
Revenues From External Customers And Long Lived Assets [Line Items]    
Long-lived assets $ 889 $ 2,013
Asia Pacific [Member]    
Revenues From External Customers And Long Lived Assets [Line Items]    
Long-lived assets $ 642 $ 393