5. Loans, Allowance for Loan Losses and Credit Quality (Details 5)	3 Months Ended		12 Months Ended
	Mar. 31, 2016 USD ($) integer	Mar. 31, 2015 USD ($) integer	Dec. 31, 2015 USD ($) integer
Number of Contracts modified as TDRs | integer	6	7	19
Pre-Modification Outstanding Recorded Investment	$ 405,497	$ 462,074	$ 2,127,411
Post- Modification Outstanding Recorded Investment	$ 423,263	$ 482,578	$ 2,245,480
Residential real estate - 1st lien
Number of Contracts modified as TDRs | integer	5	5	12
Pre-Modification Outstanding Recorded Investment	$ 395,236	$ 344,329	$ 1,229,100
Post- Modification Outstanding Recorded Investment	$ 412,923	$ 360,905	$ 1,303,228
Residential Real Estate Jr Lien
Number of Contracts modified as TDRs | integer	1	2	2
Pre-Modification Outstanding Recorded Investment	$ 10,261	$ 117,745	$ 117,746
Post- Modification Outstanding Recorded Investment	$ 10,340	$ 121,673	$ 121,672
Commercial and industrial
Number of Contracts modified as TDRs | integer			2
Pre-Modification Outstanding Recorded Investment			$ 199,134
Post- Modification Outstanding Recorded Investment			$ 204,142
Commercial Real Estate
Number of Contracts modified as TDRs | integer			3
Pre-Modification Outstanding Recorded Investment			$ 581,431
Post- Modification Outstanding Recorded Investment			$ 616,438