Commitments and Contingencies (Details) $ in Millions	Jun. 30, 2019 USD ($)
Enterprise Resource Planning
Commitments and Contingencies
Future commitments to be incurred	$ 2.7
Engineering, Procurement and Construction Contract
Commitments and Contingencies
Commitment with the issuance of LNTP	30.3
Value of common stock that can be issued for settlement of commitment	$ 15.0

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

No definition available.

Name:	us-gaap_OtherCommitment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant