11. Fair Value: Schedule of Fair Value of Financial Instruments at Year-End (Details) - USD ($)		Dec. 31, 2017	Dec. 31, 2016
Assets:
Loans, net of allowance for loan losses		$ 25,545,751	$ 26,534,607
Servicing asset		319,368	312,814
Liabilities:
Savings deposits		11,505,417	11,734,512
Time deposits		9,340,000
Accrued interest receivable		13,939	10,997
Carrying Amount
Assets:
Loans, net of allowance for loan losses	[1]	25,545,000	26,535,000
Liabilities:
Time deposits	[2]	9,339,000	10,411,000
Fair Value
Assets:
Loans, net of allowance for loan losses	[1]	25,831,000	26,617,000
Liabilities:
Time deposits	[2]	9,280,000	10,395,000
Fair Value, Inputs, Level 1
Assets:
Servicing asset		0	0
Fair Value, Inputs, Level 1 | Carrying Amount
Assets:
Cash and cash equivalents		11,671,000	7,803,000
Fair Value, Inputs, Level 1 | Fair Value
Assets:
Cash and cash equivalents		11,671,000	7,803,000
Fair Value, Inputs, Level 2
Assets:
Servicing asset		0	0
Fair Value, Inputs, Level 2 | Carrying Amount
Assets:
Accrued interest receivable		153,000	141,000
Liabilities:
Demand Deposits		34,610,000	28,497,000
Savings deposits		11,505,000	11,735,000
Accrued interest receivable		14,000	11,000
Fair Value, Inputs, Level 2 | Fair Value
Assets:
Accrued interest receivable		153,000	141,000
Liabilities:
Demand Deposits		34,610,000	28,497,000
Savings deposits		11,505,000	11,735,000
Accrued interest receivable		14,000	11,000
Fair Value, Inputs, Level 3
Assets:
Servicing asset		319,000	313,000
Fair Value, Inputs, Level 3 | Carrying Amount
Assets:
Servicing asset		319,000	313,000
Fair Value, Inputs, Level 3 | Fair Value
Assets:
Servicing asset		$ 319,000	$ 313,000

[1] Level 2 for non-impaired loans; Level 3 for certain impaired loans.

[2] Level 1 for variable rate instruments, Level 3 for fixed rate instruments