Balance Sheets (Parentheticals) - $ / shares $ / shares in Thousands	Dec. 31, 2020	Dec. 31, 2019
Common Stock, no par value (in dollars per share)	$ 0	$ 0
Common Stock, shares authorized (in shares)	3,000,000	3,000,000
Common stock, shares issued (in shares)	1,942,495	1,942,495
Common Stock, shares outstanding (in shares)	1,942,495	1,942,495