Severance, Impairment And Other Charges (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		12 Months Ended
	Feb. 29, 2020	Jan. 31, 2019	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2017
Severance, Impairment and Other Charges [Line Items]
Severance expense			$ 590		$ 1,061	$ 135
Headcount reduction	7.00%
Balance of accruals					148	44	$ 675
U.S. [Member]
Severance, Impairment and Other Charges [Line Items]
Severance expense					733	125
Italy [Member]
Severance, Impairment and Other Charges [Line Items]
Severance expense					235
Germany [Member]
Severance, Impairment and Other Charges [Line Items]
Severance expense					$ 93	$ 10
Chief Executive Officer [Member]
Severance, Impairment and Other Charges [Line Items]
Severance expense				$ 471
Trade Secrets Case [Member]
Severance, Impairment and Other Charges [Line Items]
Accrual for judgment/settlement								$ 675
Net payments due to settlement with defendants		$ 66