STOCK-BASED COMPENSATION - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Number of Options
Outstanding, beginning of period (in shares)	743,145	737,145
Granted (in shares)	47,500	70,000
Exercised (in shares)	(100,500)	(34,000)
Forfeited (in shares)	(15,000)	(24,250)
Expired (in shares)	(5,000)	(5,750)
Outstanding, end of period (in shares)	670,145	743,145
Wgtd.  Avg. Exercise Price
Outstanding, beginning of period (in dollars per share)	$ 4.54	$ 4.33
Granted (in dollars per share)	6.00	6.40
Exercised (in dollars per share)	4.32	4.46
Forfeited (in dollars per share)	3.92	3.70
Expired (in dollars per share)	6.91	4.06
Outstanding, end of period (in dollars per share)	$ 4.67	$ 4.54
For options expected to vest
Number expected to vest (in shares)		662,160	733,068
Number expected to vest (in dollars per share)		$ 4.66	$ 4.52
Weighted average remaining term, in years	3 years 3 months 18 days	3 years 6 months
Intrinsic value (000s)	$ 2,656	$ 1,757
For exercisable options
Number exercisable (in shares)	506,145	566,146
Number exercisable (in dollars per share)	$ 4.31	$ 4.22
Weighted average remaining term, in years	2 years 1 month 6 days	2 years 6 months
Intrinsic value (000s)	$ 2,198	$ 1,521
For non-exercisable options
Expense not yet recognized (000s)	$ 339	$ 329
Weighted average years to be recognized	2 years 9 months 18 days	3 years 3 months 18 days
For options exercised, Intrinsic value (000s)	$ 444	$ 77