Quarterly report pursuant to Section 13 or 15(d)

Customer Concentrations - Additional Information (Detail)

v3.20.1
Customer Concentrations - Additional Information (Detail) - Customer Concentration Risk [Member]
3 Months Ended 12 Months Ended
Mar. 31, 2020
USD ($)
Customer
Mar. 31, 2019
Customer
Dec. 31, 2019
Customer
Revenues [Member]      
Concentration Risk [Line Items]      
Number of customers 2 4  
Concentration percentage 82.00% 98.00%  
Accounts Receivable [Member]      
Concentration Risk [Line Items]      
Number of customers 2   4
Concentration percentage 90.00%   100.00%
Accounts Receivable [Member] | Dialog Semiconductor Plc [Member]      
Concentration Risk [Line Items]      
Accounts receivable | $ $ 43,322