Pension Plan (Details Textual) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	May 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Sep. 30, 2018
Pension Plan (Details Textual)
Defined benefit pension plans			$ 110.4	$ 95.8
Defined benefit pension plans asset/liability			$ (3.1)	5.3
Description of plan investment policy strategy	The actuarial valuation revealed that the statutory funding objective was not met, i.e. there were insufficient assets to cover the Scheme's Technical Provisions and there was a funding shortfall of £5.6 million ($7.4 million) at the valuation date. Under the Recovery Plan and Schedule of Contributions agreed between the Trustee and the Company, on March 15, 2019, it was agreed that no further deficit reduction contributions shall be made to the scheme, except in the event that the scheme funding level does not progress as expected, in which case contingent contributions would be made subject to an agreed maximum amount. At December 31, 2019, it was determined that contingent contributions of $1.1 million will be payable during the year ended December 31, 2020.		The current strategy is to hold 22% in a diversified growth fund, 12% in diversified credit, 15% in equity-linked bonds, 6% in a liability-driven investment fund and 45% in a buy-in policy.
Accumulated other comprehensive income			$ 0.6
Contributions payable amount		0.4	2.1	2.0
Contributions total		$ 0.3	$ 0.5	$ 0.2