6. Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Total assets at fair value	$ 24,708	$ 24,783
Fair Value Inputs Level 1 [Member]
Total assets at fair value	24,000	24,014
Fair Value Inputs Level 2 [Member]
Total assets at fair value	708	769
Fair Value Inputs Level 3 [Member]
Total assets at fair value	0	0
U. S. Treasuries [Member]
Total assets at fair value	24,000	24,014
U. S. Treasuries [Member] | Fair Value Inputs Level 1 [Member]
Total assets at fair value	24,000	24,014
U. S. Treasuries [Member] | Fair Value Inputs Level 2 [Member]
Total assets at fair value	0	0
U. S. Treasuries [Member] | Fair Value Inputs Level 3 [Member]
Total assets at fair value	0	0
Mortgage-backed obligations of federal agencies [Member]
Total assets at fair value	573	634
Mortgage-backed obligations of federal agencies [Member] | Fair Value Inputs Level 1 [Member]
Total assets at fair value	0	0
Mortgage-backed obligations of federal agencies [Member] | Fair Value Inputs Level 2 [Member]
Total assets at fair value	573	634
Mortgage-backed obligations of federal agencies [Member] | Fair Value Inputs Level 3 [Member]
Total assets at fair value	0	0
Marketable Equities [Member]
Total assets at fair value	135	135
Marketable Equities [Member] | Fair Value Inputs Level 1 [Member]
Total assets at fair value	0	0
Marketable Equities [Member] | Fair Value Inputs Level 2 [Member]
Total assets at fair value	135	135
Marketable Equities [Member] | Fair Value Inputs Level 3 [Member]
Total assets at fair value	0	0
Securities Available for Sale [Member]
Total assets at fair value	24,708	24,783
Securities Available for Sale [Member] | Fair Value Inputs Level 1 [Member]
Total assets at fair value	24,000	24,014
Securities Available for Sale [Member] | Fair Value Inputs Level 2 [Member]
Total assets at fair value	708	634
Securities Available for Sale [Member] | Fair Value Inputs Level 3 [Member]
Total assets at fair value	$ 0	$ 0