XML 39 R23.htm IDEA: XBRL DOCUMENT v2.4.1.9
Note 1 - Nature of the Business (Details) (USD $)
0 Months Ended
Oct. 01, 2014
Nov. 10, 2014
Sep. 30, 2014
Dec. 31, 2013
Series A Preferred Stock [Member] | Preferred Stock [Member] | Subsequent Event [Member] | Reverse Stock Split [Member]        
Note 1 - Nature of the Business (Details) [Line Items]        
Stockholders' Equity Note, Stock Split, Conversion Ratio 4.86us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
/ us-gaap_NonmonetaryTransactionTypeAxis
= xene_ReverseStockSplitMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Series A Preferred Stock [Member] | Subsequent Event [Member]        
Note 1 - Nature of the Business (Details) [Line Items]        
Conversion of Stock, Shares Issued 1,151,468us-gaap_ConversionOfStockSharesIssued1
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Preferred Stock, Shares Outstanding 1,151,468us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Series A Preferred Stock [Member]        
Note 1 - Nature of the Business (Details) [Line Items]        
Preferred Stock, Shares Outstanding     1,151,468us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
1,151,468us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
Series B Preferred Stock [Member] | Preferred Stock [Member] | Subsequent Event [Member] | Reverse Stock Split [Member]        
Note 1 - Nature of the Business (Details) [Line Items]        
Stockholders' Equity Note, Stock Split, Conversion Ratio 4.86us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
/ us-gaap_NonmonetaryTransactionTypeAxis
= xene_ReverseStockSplitMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Series B Preferred Stock [Member] | Subsequent Event [Member]        
Note 1 - Nature of the Business (Details) [Line Items]        
Conversion of Stock, Shares Issued 994,885us-gaap_ConversionOfStockSharesIssued1
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Preferred Stock, Shares Outstanding 994,885us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Series B Preferred Stock [Member]        
Note 1 - Nature of the Business (Details) [Line Items]        
Preferred Stock, Shares Outstanding     994,885us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
994,885us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
Series E Preferred Stock [Member] | Preferred Stock [Member] | Subsequent Event [Member] | Reverse Stock Split [Member]        
Note 1 - Nature of the Business (Details) [Line Items]        
Stockholders' Equity Note, Stock Split, Conversion Ratio 4.86us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
/ us-gaap_NonmonetaryTransactionTypeAxis
= xene_ReverseStockSplitMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Series E Preferred Stock [Member] | Subsequent Event [Member]        
Note 1 - Nature of the Business (Details) [Line Items]        
Conversion of Stock, Shares Issued 5,579,571us-gaap_ConversionOfStockSharesIssued1
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Preferred Stock, Shares Outstanding 4,322,126us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Series E Preferred Stock [Member]        
Note 1 - Nature of the Business (Details) [Line Items]        
Preferred Stock, Shares Outstanding     4,322,126us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember
4,322,126us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember
IPO [Member] | Subsequent Event [Member]        
Note 1 - Nature of the Business (Details) [Line Items]        
Stock Issued During Period, Shares, New Issues   4,600,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
   
Share Price (in Dollars per share)   $ 9.00us-gaap_SharePrice
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
   
Private Placement [Member] | Common Stock [Member] | Subsequent Event [Member] | Genetech Affiliate [Member]        
Note 1 - Nature of the Business (Details) [Line Items]        
Stock Issued During Period, Shares, New Issues   495,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= xene_GenetechAffiliateMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
   
Share Price (in Dollars per share)   $ 9.00us-gaap_SharePrice
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= xene_GenetechAffiliateMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
   
Common Stock [Member] | Converted from Convertible Preferred Shares [Member] | Subsequent Event [Member]        
Note 1 - Nature of the Business (Details) [Line Items]        
Conversion of Stock, Shares Issued   7,725,924us-gaap_ConversionOfStockSharesIssued1
/ us-gaap_ConversionOfStockByUniqueDescriptionAxis
= xene_ConvertedFromConvertiblePreferredSharesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
   
Common Stock [Member] | Converted from Subscription Rights [Member] | Subsequent Event [Member]        
Note 1 - Nature of the Business (Details) [Line Items]        
Conversion of Stock, Shares Issued   10,200us-gaap_ConversionOfStockSharesIssued1
/ us-gaap_ConversionOfStockByUniqueDescriptionAxis
= xene_ConvertedFromSubscriptionRightsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
   
Common Stock [Member] | Subsequent Event [Member] | Reverse Stock Split [Member]        
Note 1 - Nature of the Business (Details) [Line Items]        
Stockholders' Equity Note, Stock Split, Conversion Ratio 4.86us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
/ us-gaap_NonmonetaryTransactionTypeAxis
= xene_ReverseStockSplitMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Common Stock [Member] | Subsequent Event [Member]        
Note 1 - Nature of the Business (Details) [Line Items]        
Preferred Stock, Shares Subscribed but Unissued   10,200us-gaap_PreferredStockShareSubscriptions
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
   
Subsequent Event [Member]        
Note 1 - Nature of the Business (Details) [Line Items]        
Conversion of Stock, Shares Issued 7,725,924us-gaap_ConversionOfStockSharesIssued1
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Preferred Stock, Shares Subscribed but Unissued   0us-gaap_PreferredStockShareSubscriptions
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
   
Preferred Stock, Shares Outstanding 6,468,479us-gaap_PreferredStockSharesOutstanding
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
0us-gaap_PreferredStockSharesOutstanding
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember