Stock Based Incentive Compensation - Summary data of stock option award activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Shares
Outstanding, number of shares	3,500	9,376
Granted, number of shares	0	0
Expired, number of shares	(500)	(1,250)
Forfeited, number of shares	0	0
Exercised, number of shares	(1,000)	(4,626)
Outstanding, number of shares	2,000	3,500
Exercisable	2,000
Vested and expected to vest	2,000
Weighted Average Exercise Price
Outstanding, weighted average exercise price (in Dollars per share)	$ 3.42	$ 4.49
Granted, weighted average exercise price (in Dollars per share)	0.00	0.00
Expired, weighted average exercise price (in Dollars per share)	2.99	6.82
Forfeited, weighted average exercise price (in Dollars per share)	0.00	0.00
Exercised, weighted average exercise price (in Dollars per share)	2.99	4.67
Outstanding, weighted average exercise price (in Dollars per share)	3.75	$ 3.42
Exercisable (in Dollars per share)	3.75
Vested and expected to vest (in Dollars per share)	$ 3.75
Outstanding, weighted average remaining contractual term	11 months 23 days
Exercisable - - weighted average remaining contractual term	11 months 23 days
Vested and expected to vest - weighted average remaining contractual term	11 months 23 days
Outstanding, aggregate intrinsic value (in Dollars)	$ 19
Exercisable - intrinsic value (in Dollars)	19
Vested and expected to vest - intrinsic value (in Dollars)	19
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value (in Dollars)	$ 8	$ 34