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Equity (Schedule of Earnings per Share) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2020
Mar. 31, 2019
Numerator:        
Loss from continuing operations $ (5,081) $ (4,994) $ (6,416) $ (10,532)
Undistributed earnings allocated to common shareholders for basic and diluted net income per share $ (5,081) $ (4,994) $ (6,416) $ (10,532)
Weighted-average number of basic and diluted shares outstanding (in shares) 29,033 27,652 28,931 27,592
Net loss per basic and diluted share (in dollars per share) $ (0.18) $ (0.18) $ (0.22) $ (0.38)
Weighted average antidilutive options, unvested restricted stock units and awards, unvested performance stock units and ESPP shares excluded from the computation 2,161 849 1,704 535