Quarterly report pursuant to Section 13 or 15(d)

Stock Based Compensation (Details Textual)

v2.4.1.9
Stock Based Compensation (Details Textual) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 250,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized  
Stock Issued During Period, Shares, Restricted Stock Award, Gross 7,250us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross 3,675us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
Allocated Share-based Compensation Expense $ 21us-gaap_AllocatedShareBasedCompensationExpense $ 15us-gaap_AllocatedShareBasedCompensationExpense
Share-based Compensation Expense, Estimated for Remainder of Fiscal Year 75nwin_SharebasedCompensationExpenseEstimatedForRemainderOfFiscalYear  
Share-based Compensation Expense, Estimated for Year Two $ 99nwin_SharebasedCompensationExpenseEstimatedForYearTwo