Summary of Significant Accounting Policies - Schedule of Concentration of Credit Risk (Details) |
3 Months Ended | 6 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2019 |
Jun. 30, 2018 |
Dec. 31, 2018 |
|
| Clarios (successor of Johnson Controls Battery Group, Inc.) | Revenue | |||||
| Concentration risk | 59.00% | 91.00% | 59.00% | 81.00% | |
| Clarios (successor of Johnson Controls Battery Group, Inc.) | Accounts Receivable | |||||
| Concentration risk | 71.00% | 95.00% | |||
| Ocean Partners USA, Inc. | Revenue | |||||
| Concentration risk | 0.00% | 5.00% | 0.00% | 15.00% | |
| Ocean Partners USA, Inc. | Accounts Receivable | |||||
| Concentration risk | 0.00% | 0.00% | |||
| P. Kay Metals | Revenue | |||||
| Concentration risk | 38.00% | 0.00% | 38.00% | 0.00% | |
| P. Kay Metals | Accounts Receivable | |||||
| Concentration risk | 27.00% | 0.00% | |||