Consolidated Condensed Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Net sales	$ 27,777	$ 24,873	$ 84,521	$ 81,331
Cost of goods sold	23,628	23,486	70,771	75,119
Gross profit	4,149	1,387	13,750	6,212
Selling, general and administrative expenses	2,864	3,481	10,393	11,375
Goodwill impairment	0	8,294	0	8,294
Amortization of intangible assets	408	411	1,224	1,239
Loss (gain) on disposal or impairment of operating assets	55	0	98	(282)
Gain on insurance proceeds received	(1,683)	(3,304)	(2,683)	(4,468)
Operating income (loss)	2,505	(7,495)	4,718	(9,946)
Interest income	0	(1)	0	(3)
Interest expense	183	230	697	838
Foreign currency exchange gain (loss), net	12	(3)	12	(4)
Other loss (income), net	27	(15)	(58)	(50)
Income (loss) before income tax (benefit) expense	2,283	(7,706)	4,067	(10,727)
Income tax (benefit) expense	33	(336)	(101)	(816)
Net income (loss)	$ 2,250	$ (7,370)	$ 4,168	$ (9,911)
Net income (loss) per share
Basic (in dollars per share)	$ 0.40	$ (1.32)	$ 0.74	$ (1.78)
Diluted (in dollars per share)	$ 0.39	$ (1.32)	$ 0.72	$ (1.78)
Weighted-average number of common shares (basic) (in shares)	5,676	5,571	5,656	5,556
Weighted-average number of common shares (diluted) (in shares)	5,807	5,571	5,768	5,556