9. Revenue Recognition: Noninterest income, segregated by revenue streams in-scope and out-of-scope of Topic 606 (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Noninterest Income (in scope of Topic 606)	$ 268	$ 237	$ 570	$ 560
Noninterest income (out-of-scope of Topic 606)	124	253	358	477
Total noninterest income	392	490	928	1,037
Customer Service Fees
Noninterest Income (in scope of Topic 606)	107	101	310	299
ATM Fee Income
Noninterest Income (in scope of Topic 606)	25	31	76	94
Loan Syndication Fees
Noninterest Income (in scope of Topic 606)	100	90	100	90
Other Income
Noninterest Income (in scope of Topic 606)	$ 36	$ 15	$ 84	$ 77