Investment in Leasing Operations: Investment Aging (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Investment in leasing operations
0-60 Days Delinquent and Accruing	$ 41,143,400	$ 42,286,700
61-90 Days Delinquent and Accruing	93,200
Total investment in direct financing and sales-type leases	41,236,600	42,286,700
Middle-Market
Investment in leasing operations
0-60 Days Delinquent and Accruing	40,058,900	41,299,600
61-90 Days Delinquent and Accruing	93,200
Total investment in direct financing and sales-type leases	40,152,100	41,299,600
Small-Ticket
Investment in leasing operations
0-60 Days Delinquent and Accruing	1,084,500	987,100
Total investment in direct financing and sales-type leases	$ 1,084,500	$ 987,100

The lessor's asset under sales type and direct financing leases. The investment in direct financing and sales-type leases, as of the balance sheet date, consisting of: (a) minimum lease payments due on direct financing leases, (b) unguaranteed residual value, and (c) any unamortized initial direct costs on direct financing leases; less: (i) estimated executory costs, (ii) unearned income, but before deducting the accumulated allowance for uncollectible minimum lease payments.

No definition available.

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Namespace Prefix:	wina_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant