Recent Accounting Pronouncements (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Oct. 01, 2018	Sep. 30, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Cumulative effect of initial application	$ 158		$ 158
Income Statement [Abstract]
Total sales	21,570		56,900
Cost of sales	16,731	$ 14,833	43,966	$ 39,720
Gross profit	4,839	5,211	12,934	13,558
Operating income (loss)	145	222	(611)	(476)
Income tax expense (benefit)	(326)	249	(466)	1,225
Net income (loss)	532	431	(37)	(1,288)
Net income (loss) attributable to common stockholders	$ 509	$ 3	$ (37)	$ (1,791)
Basic earnings per share (dollars per share)	$ 0.13		$ (0.01)	$ (0.47)
Diluted earnings per share (dollars per share)	$ 0.12		$ (0.01)	$ (0.47)
Assets:
Accounts receivable	$ 16,645		$ 16,645			$ 11,980
Unbilled accounts receivable						1,166
Inventories	9,868		9,868			7,558
Other current assets	3,719		3,719			1,878
Deferred tax asset	1,873		1,873			1,895
Liabilities:
Deferred revenue	791		791
Shareholders' Equity:
Retained earnings	28,203		28,203			$ 29,926
Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Cumulative effect of initial application					$ 158
Balances without adoption of ASC 606 | Accounting Standards Update 2014-09
Income Statement [Abstract]
Total sales	21,071		56,302
Cost of sales	16,284		43,387
Gross profit	4,787		12,915
Operating income (loss)	93		(630)
Income tax expense (benefit)	(351)		(484)
Net income (loss)	505		(38)
Net income (loss) attributable to common stockholders	$ 505		$ (38)
Basic earnings per share (dollars per share)	$ 0.13		$ (0.01)
Diluted earnings per share (dollars per share)	$ 0.12		$ (0.01)
Assets:
Accounts receivable	$ 16,475		$ 16,475
Unbilled accounts receivable	588		588
Inventories	10,639		10,639
Other current assets	3,125		3,125
Deferred tax asset	1,914		1,914
Liabilities:
Deferred revenue	1,586		1,586
Shareholders' Equity:
Retained earnings	28,044		28,044
Effect of change Higher/(Lower) | Accounting Standards Update 2014-09
Income Statement [Abstract]
Total sales	499		598
Cost of sales	447		579
Gross profit	52		19
Operating income (loss)	52		19
Income tax expense (benefit)	25		18
Net income (loss)	27		1
Net income (loss) attributable to common stockholders	4		1
Assets:
Accounts receivable	170		170
Unbilled accounts receivable	(588)		(588)
Inventories	(771)		(771)
Other current assets	594		594
Deferred tax asset	(41)		(41)
Liabilities:
Deferred revenue	(795)		(795)
Shareholders' Equity:
Retained earnings	$ 159		$ 159