Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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The cash inflow from sale of buildings.

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Month of expiry of sublease.

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Leases - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Sep. 30, 2020	Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2020	Nov. 30, 2019
Operating Lease, Cost		$ 147	$ 147	$ 440	$ 440
Operating Lease, Payments		143		$ 429
Month of expiry of sublease				2022-03
Short-term Lease, Cost				$ 11
Gain on sale of building				$ 1,724
Pennyslavania [Member]
Month of expiry of lease				2020-09
Proceeds from Sale of Buildings	$ 2,028
Gain on sale of building		1,724		$ 1,724
Companys Chief Executive Officer And Ordway Properties LLC [Member]
Operating Lease, Cost		$ 97	$ 97	$ 291	$ 292