Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Allowance for doubtful accounts receivable, current	$ 20	$ 1
Common stock, par or stated value per share (in USD per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	900,000,000	900,000,000
Common stock, shares issued	40,954,000	40,882,000
Common stock, shares outstanding	40,954,000	40,882,000