PER SHARE DATA - Reconciliation of Basic and Diluted Common Shares (Details) - shares	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Basic weighted-average shares (in shares)	12,457,043	12,437,916	12,447,321	12,437,916
Diluted weighted-average shares (in shares)	12,457,043	12,461,882	12,447,321	12,450,178
Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of dilutive securities (in shares)	0	0	0	279
Unvested restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of dilutive securities (in shares)	0	23,966	0	11,983