Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Operating Loss Carryforwards [Line Items]
Income tax expense (benefit)	$ 1,918		$ 615	$ (364)	$ 1,113
Profit before tax	$ 5,800		$ 1,900	$ 7,600	$ 3,200
Effective income tax rate percentage	33.00%	18.90%	33.00%	(5.00%)	35.00%
UK tax expense on pre-tax income		$ 2,500
Effective UK tax rate on pre-tax income		34.00%
Possible reduction in long-term tax obligations	$ 100			$ 100
Tax Years 2019 and 2020
Operating Loss Carryforwards [Line Items]
Income tax expense (benefit)	$ (2,700)	$ (2,700)
Foreign Tax Authority | Her Majesty's Revenue and Customs (HMRC)
Operating Loss Carryforwards [Line Items]
Effect of increase in UK corporate tax rate		$ (200)