CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Consolidated Balance Sheets
Allowance of Accounts receivable	$ 1,988	$ 2,422
Common stock par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	54,359,434	46,201,563
Common stock, shares outstanding	54,359,434	46,201,563