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Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Capital commitments At December 31, 2020, the Company had capital expenditure commitments of $1.1 million (2019: $1.0 million and 2018: $2.5 million) for the acquisition of new plant and equipment. Committed banking facilities At December 31, 2020 and 2019 the Company had committed banking facilities of $150.0 million. Of the committed facilities, $4.1 million was drawn at December 31, 2020 ( 2019: $17.5 million). The Company had a separate (uncommitted) facility for letters of credit which at December 31, 2020 and 2019 was £1.0 million ($1.3 million). None of this were utilized at December 31, 2020 and 2019 respectively. The Company also has two separate (uncommitted) bonding facilities for bank guarantees; one denominated in GBP sterling of £4.5 million (2020: $6.1 million, 2019: $5.9 million), and one denominated in USD of $1.5 million (2019: $0.4 million). Of that dominated in GBP, £1.0 million ($1.4 million) was utilized at December 31, 2020 (2019: £1.6 million / $2.3 million). Of that denominated in USD, $0.8 million was utilized in December 31, 2020 (2019: fully utilized). Contingencies During February 2014, a cylinder was sold to a long-term customer and ruptured at one of their gas facilities. As a result of this rupture, three people were noted to have injuries such as loss of hearing. There was no major damage to assets of the customer. A claim has been launched by the three people who were injured in the incident. We have reviewed our quality control checks from around the time which the cylinder was produced and no instances of failures have been noted. It has also been noted by the investigator that the customer has poor quality and safety checks. As a result we do not believe that we are liable for the incident, and therefore, do not currently expect this case to have a material impact on the Company's financial position or results of operations. In November 2018, an alleged explosion occurred at a third-party waste disposal and treatment site in Boise, Idaho, reportedly causing property damage, personal injury, and one fatality. We had contracted with a service company for removal and disposal of certain waste resulting from the magnesium powder manufacturing operations at the Reade facility in Manchester, New Jersey. We believe this service company, in turn, apparently contracted with the third-party disposal company, at whose facility the explosion occurred, for treatment and disposal of the waste. In November 2020, we were named as a defendant in three lawsuits in relation to the incident – one by the third-party disposal company, one by the estate of the decedent, and one by an injured employee of the third-party disposal company. At present, we have received insufficient information on the cause of the explosion. We do not believe that we are liable for the incident, have asserted such, and, therefore, do not currently expect this matter to have a material impact on the Company’s financial position or results of operations.