Consolidated Balance Sheets (Parenthetical) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Consolidated Balance Sheets [Abstract]
Accounts receivable, allowance	$ 28,000	$ 28,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	4,325,154	4,238,430
Common stock, shares outstanding	4,235,154	4,238,430