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Lease Obligations - Additional Information (Details) € in Thousands			3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 EUR (€)	Nov. 30, 2020 USD ($)	Nov. 30, 2019 USD ($)	Nov. 30, 2020 USD ($)	Nov. 30, 2019 USD ($)
Leases [Line Items]
Short term leases			$ 0		$ 0
Gain related to execution of sale transaction				$ 4,057,000		$ 4,057,000
Other Income (Expense) [Member]
Leases [Line Items]
Rental income			$ 188,000	176,000	$ 556,000	460,000
Selling Real Property in Pulheim, Germany to CLM S.A. RL [Member]
Leases [Line Items]
Sale leaseback transaction, selling price \| €		€ 10,920
Net proceeds from sale leaseback transaction	$ 9,500,000
Gain related to execution of sale transaction				$ 4,057,000		$ 4,057,000
Minimum [Member]
Leases [Line Items]
Operating and finance leases remaining lease terms					1 year
Maximum [Member]
Leases [Line Items]
Operating and finance leases remaining lease terms					10 years