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Customer Concentrations - Additional Information (Detail) - Customer Concentration Risk [Member] | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2020 USD ($) Customer | Jun. 30, 2019 Customer | Jun. 30, 2020 USD ($) Customer | Jun. 30, 2019 Customer | Dec. 31, 2019 Customer
Revenues [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Number of customers | 2 | 2 | 2 | 3 |
Concentration percentage | 96.00% | 95.00% | 85.00% | 75.00% |
Accounts Receivable [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Number of customers |  |  | 1 |  | 4
Concentration percentage |  |  | 85.00% |  | 100.00%
Accounts Receivable [Member] | Dialog Semiconductor Plc [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Accounts receivable | $ | $ 89,375 |  | $ 89,375 |  |

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