CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Valuation Allowances and Reserves, Balance	$ 873	$ 736
Common stock par value, in dollars per share	$ 0.002	$ 0.002
Common stock, shares authorized	200,000,000	140,000,000
Common stock, shares issued	85,939,000	84,856,000
Common stock, shares outstanding	85,939,000	84,856,000