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Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net (loss) income	$ (307)	$ 208
Denominator:
Denominator for basic net (loss) income per common share — weighted average shares outstanding	29,374,000	28,467,000
Effect of dilutive securities:
Stock options and restricted stock units	0	1,147,000
Denominator for diluted net (loss) income per common share — adjusted weighted average shares	29,374,000	29,614,000
Basic net loss per common share:
Net (loss) income, basic (USD per share)	$ (0.01)	$ 0.01
Diluted net loss per common share
Net (loss) income, diluted (USD per share)	$ (0.01)	$ 0.01
Potentially dilutive securities excluded from computation of earnings per share	547,045	594,447
Excluded incremental common shares related to common stock options and restricted stock units	1,157,727

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