Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets
Allowance for doubtful accounts and discounts	$ 1,600	$ 1,800
Stockholders' equity
Common stock, par value
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	16,154,000
Common stock, shares outstanding	16,154,000	16,210,000