BALANCE SHEETS (Parenthetical) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
SHAREHOLDERS' EQUITY
Preferred stock, authorized shares	10,000,000	10,000,000
Preferred stock, issued shares	1,074,338	0
Preferred stock, outstanding shares	1,074,338	0
Liquidation preference	$ 4,458,710	$ 0
Common stock, par value	$ 0	$ 0
Common stock, authorized shares	10,000,000	10,000,000
Common stock, issued shares	5,139,177	4,983,206
Common stock, outstanding shares	4,989,216	4,869,788
Common stock held in treasury	149,961	113,418