Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Sep. 30, 2015
Consolidated Balance Sheets
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 718	$ 471
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	120,000,000	120,000,000
Common stock, shares issued	30,742,662	30,026,223
Common stock, shares outstanding	30,742,662	30,026,223