CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
CURRENT ASSETS:
Allowances for accounts receivable	$ 27,000	$ 183,000
STOCKHOLDERS' EQUITY (DEFICIT)
Convertible preferred stock percentage	15.00%	15.00%
15% Convertible preferred stock, par value (in dollars per share)	$ 100	$ 100
15% Convertible preferred stock, shares authorized (in shares)	1,200,000	1,200,000
15% Convertible preferred stock, shares issued (in shares)	1,131,551	1,131,551
15% Convertible preferred stock, shares outstanding (in shares)	1,131,551	1,131,551
15% Convertible preferred stock, liquidation value	$ 113,155	$ 113,155
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	35,000,000	35,000,000
Common stock, shares issued (in shares)	9,822,304	9,822,304
Treasury stock, at cost, (in shares)	1,871,128	1,871,128