XML 45 R27.htm IDEA: XBRL DOCUMENT v3.5.0.2
Nature of Operations and Summary of Significant Accounting Policies - Computation of Basic and Diluted Net Income (Loss) Per Share (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2014
Earnings Per Share Basic And Diluted [Line Items]                              
Net income (loss) $ 960 $ 739 $ 582 $ (322) $ 955 $ 918 $ 507 $ 146 $ 2 $ (1,633) $ (2,193) $ (1,468) $ 1,959 $ 2,526 $ (5,292)
Weighted-average common shares and share equivalents outstanding—basic 32,086,223 31,823,386 31,325,577 31,094,417 30,969,157 30,764,694 30,697,391 30,618,097 30,510,587 30,481,168 30,453,455 30,402,397 31,586,535 30,790,258 30,466,063
Weighted-average common shares and share equivalents outstanding—diluted 34,859,861 34,531,964 33,133,920 31,094,417 31,664,178 31,645,696 31,321,259 31,173,815 31,022,148 30,481,168 30,453,455 30,402,397 33,818,501 31,480,241 30,466,063
Net income (loss) per share - Basic $ 0.03 $ 0.02 $ 0.02 $ (0.01) $ 0.03 $ 0.03 $ 0.02 $ 0.00 $ 0.00 $ (0.05) $ (0.07) $ (0.05) $ 0.06 $ 0.08 $ (0.17)
Net income (loss) per share - Diluted $ 0.03 $ 0.02 $ 0.02 $ (0.01) $ 0.03 $ 0.03 $ 0.02 $ 0.00 $ 0.00 $ (0.05) $ (0.07) $ (0.05) $ 0.06 $ 0.08 $ (0.17)
Stock options [Member]                              
Earnings Per Share Basic And Diluted [Line Items]                              
Dilutive potential common stock equivalents                         2,231,966 689,983