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Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Narrative (Details)

v3.19.3.a.u2
Summary of Significant Accounting Policies - Narrative (Details)
12 Months Ended
Dec. 31, 2019
USD ($)
financial_institution
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Concentration Risk [Line Items] Ìý Ìý Ìý
Depreciation expense $ 8,500,000 $ 2,600,000 $ 400,000
Unrecognized tax benefits 0 0 Ìý
Accumulated depreciation, royalty interests 260,000 $ 0 Ìý
Operating lease right-of-use assets 3,098,000 Ìý Ìý
Total operating lease liabilities 3,367,000 Ìý Ìý
Operating lease cost 700,000 Ìý Ìý
Service life Ìý Ìý Ìý
Concentration Risk [Line Items] Ìý Ìý Ìý
Depreciation expense $ 2,400,000 Ìý Ìý
Cash and Cash Equivalents | Customer Concentration Risk Ìý Ìý Ìý
Concentration Risk [Line Items] Ìý Ìý Ìý
Number of customers | financial_institution 4 Ìý Ìý
Sales Revenue, Net | Customer Concentration Risk Ìý Ìý Ìý
Concentration Risk [Line Items] Ìý Ìý Ìý
Concentration risk (in percentage) 36.50% 31.30% 26.50%
Maximum Ìý Ìý Ìý
Concentration Risk [Line Items] Ìý Ìý Ìý
Royalty payment arrangement, term 2 months Ìý Ìý
Lease terms of payment arrangements 10 years Ìý Ìý
Maximum | Water service-related assets Ìý Ìý Ìý
Concentration Risk [Line Items] Ìý Ìý Ìý
Finite-lived intangible asset, useful life 30 years Ìý Ìý
Minimum Ìý Ìý Ìý
Concentration Risk [Line Items] Ìý Ìý Ìý
Royalty payment arrangement, term 1 month Ìý Ìý
Lease terms of payment arrangements 1 month Ìý Ìý
Minimum | Water service-related assets Ìý Ìý Ìý
Concentration Risk [Line Items] Ìý Ìý Ìý
Finite-lived intangible asset, useful life 3 years Ìý Ìý