Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 25
-Paragraph 20
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=96869850&loc=d3e28680-109314

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319

Name:	us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2017	Nov. 30, 2016	Nov. 30, 2015	Feb. 28, 2018
Fiscal Year
Length of fiscal year	12 months	12 months	12 months
Cash and Cash Equivalents
Money market funds invested in U.S. Treasury obligations	$ 29,432	$ 22,409
Impairment of Investments in Long Lived Assets
Impairment losses	0	0	$ 0
Income Taxes
Accrual for uncertain income tax positions	0
Deferred Tax Assets
Deferred tax asset	$ 970	$ 892
Accounting Standards Update 2016-09 Compensation-Stock Compensation \| Forecast Adjustment
Deferred Tax Assets
Deferred tax asset				$ 900