Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2017	Dec. 31, 2016
Consolidated Balance Sheets
Common stock, no par value	$ 0	$ 0
Common stock, authorized shares	1,388,395	1,389,786
Common stock issued shares	2,721,086	2,719,695
Common stock, outstanding shares	2,721,086	2,719,695
Treasury shares, shares	0	0