Credit Risk and Allowance for Credit Losses - Concentration of Credit Risk (Details)	6 Months Ended	12 Months Ended
Jun. 30, 2020	Dec. 31, 2019
Accounts Receivable \| Three Customers \| Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk percentage	73.00%	42.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Publisher FASB
-Name Accounting Standards Codification
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