BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 5	$ 5
Preferred stock, par value	$ .01	$ 0.01
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ .01	$ 0.01
Common stock, shares issued	33,847,793	33,847,793
Common stock, shares outstanding	33,847,793	33,847,793