Condensed Balance Sheets (Parenthetical) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Allowance For Doubtful Accounts Receivable, Current (in dollars)	$ 51,000	$ 52,000
Inventory Valuation Reserves	$ 521,000	$ 500,000
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	29,932,770	29,782,770
Common stock, shares outstanding	29,932,770	29,782,770