Leases - Additional Information (Detail)	Nov. 30, 2019 USD ($)
Leases [Abstract]
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent
Finance lease right-of-use asset	$ 266,000
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherAccruedLiabilitiesCurrent
Finance lease liabilities, current	$ 84,000
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent
Long-term finance lease liabilities	$ 183,000