Recent Accounting Pronouncements - Impact of Adoption of ASU 2016-02 Leases (Topic 842) on Consolidated Financial Statements (Details) - USD ($) $ in Thousands		Dec. 01, 2019	Aug. 31, 2020	May 31, 2020	Feb. 29, 2020	Nov. 30, 2019		Aug. 31, 2019	May 31, 2019	Feb. 28, 2019	Nov. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201602Member
Assets
Prepaid expenses and other assets			$ 1,152			$ 377	[1]
Operating lease assets			22
Total assets			174,407			165,712	[1]
Liabilities
Other liabilities			0			86	[1]
Total liabilities			116,148			123,599	[1]
Total stockholders' equity			58,259	$ 59,266	$ 54,582	42,113	[1]	$ 44,443	$ (35,923)	$ (10,136)	$ 27,242
Total liabilities and stockholders' equity			$ 174,407			165,712	[1]
Net effect	[1]					$ 0
As reported under ASU 2016-02
Assets
Prepaid expenses and other assets		$ 353
Operating lease assets		132
Total assets		165,868
Liabilities
Other liabilities		39
Operating lease liability		203
Total liabilities		123,755
Total stockholders' equity		42,113
Total liabilities and stockholders' equity		165,868
Net effect		0
Effect of change
Assets
Prepaid expenses and other assets		24
Operating lease assets		132
Total assets		156
Liabilities
Other liabilities		(47)
Operating lease liability		203
Total liabilities		156
Total stockholders' equity		0
Total liabilities and stockholders' equity		156
Net effect		$ 0

[1] Derived from audited consolidated financial statements.