Annual report pursuant to Section 13 and 15(d)

Consolidated Balance Sheets (Parenthetical)

v3.7.0.1
Consolidated Balance Sheets (Parenthetical) - USD ($)
Dec. 31, 2016
Dec. 31, 2015
Consolidated Balance Sheets [Abstract]    
Trade accounts receivable, allowance for doubtful accounts $ 77,000 $ 123,000
Preferred stock, par value $ 1.00 $ 1.00
Preferred stock, shares authorized 3,000,000 3,000,000
Preferred stock, shares issued 0 0
Common stock, par value $ 0.05 $ 0.05
Common stock, shares authorized 30,000,000 30,000,000
Common stock, shares issued 8,877,379 8,754,550
Common stock, shares outstanding 8,877,379 8,754,550