2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 2) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Basic EPS, income	$ 8,672	$ 8,595	$ 9,081
Basic EPS, shares	3,238,177	3,269,713	3,282,335
Basic EPS, per share amounts	$ 2.68	$ 2.63	$ 2.77
Effect of dilutive securities convertible preferred stock, income	$ 413	$ 415	$ 487
Effect of dilutive securities convertible preferred stock, shares	357,841	362,271	434,256
Effect of dilutive securities convertible preferred stock, per share amounts	$ (.15)	$ (0.15)	$ (0.20)
Diluted EPS, net income	$ 9,085	$ 9,010	$ 9,568
Diluted EPS, shares	3,596,017	3,631,984	3,716,591
Diluted EPS, per share amounts	$ 2.53	$ 2.48	$ 2.57