CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Deficit
Beginning Balance (in shares) at Sep. 30, 2018		11,899	0
Beginning Balance at Sep. 30, 2018	$ 39,418	$ 12	$ 0	$ 84,285	$ (44,879)
Expense related to director restricted stock unit (in shares)		102
Expense related to director restricted stock unit	263			263
Expense related to employee stock options	129			129
Exercise of stock options (in shares)		35
Exercise of stock options	39			39
Net income	2,955
Ending Balance (in shares) at Mar. 31, 2019		12,036	0
Ending Balance at Mar. 31, 2019	42,804	$ 12	$ 0	84,716	(41,924)
Beginning Balance (in shares) at Dec. 31, 2018		12,036	0
Beginning Balance at Dec. 31, 2018	41,340	$ 12	$ 0	84,517	(43,189)
Expense related to director restricted stock unit	132			132
Expense related to employee stock options	67			67
Net income	1,265
Ending Balance (in shares) at Mar. 31, 2019		12,036	0
Ending Balance at Mar. 31, 2019	$ 42,804	$ 12	$ 0	84,716	(41,924)
Beginning Balance (in shares) at Sep. 30, 2019	12,036	12,036	0
Beginning Balance at Sep. 30, 2019	$ 45,571	$ 12	$ 0	85,114	(39,555)
Expense related to director restricted stock unit (in shares)		90
Expense related to director restricted stock unit	173			173
Expense related to employee stock options	$ 211			211
Exercise of stock options (in shares)	505	345
Exercise of stock options	$ 27			27
Repurchases of common stock (in shares)			28
Repurchases of common stock	(113)		$ (113)
Cancellation of common stock (in shares)		(117)	(28)
Cancellation of common stock	(98)		$ 113	(211)
Net income	$ 3,628				3,628
Ending Balance (in shares) at Mar. 31, 2020	12,354	12,354	0
Ending Balance at Mar. 31, 2020	$ 49,397	$ 12	$ 0	85,314	(35,929)
Beginning Balance (in shares) at Dec. 31, 2019		12,124	27
Beginning Balance at Dec. 31, 2019	47,145	$ 12	$ (111)	85,249	(38,005)
Expense related to director restricted stock unit	87			87
Expense related to employee stock options	95			95
Exercise of stock options (in shares)		325
Exercise of stock options	0
Repurchases of common stock (in shares)			1
Repurchases of common stock	(2)		$ (2)
Cancellation of common stock (in shares)		(95)	(28)
Cancellation of common stock	(4)		$ 113	(117)
Net income	$ 2,076				2,076
Ending Balance (in shares) at Mar. 31, 2020	12,354	12,354	0
Ending Balance at Mar. 31, 2020	$ 49,397	$ 12	$ 0	$ 85,314	$ (35,929)