Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Captal	Accumulated Other Comprehensive Loss	Accumulated Deficit
Balance at Sep. 30, 2019	$ 17,815	$ 53	$ 24,694	$ (457)	$ (6,475)
Balance (in shares) at Sep. 30, 2019		5,315,739
Stock-based compensation	162	$ 1	161
Stock-based compensation (in shares)		40,294
Stock options exercised	4		4
Stock options exercised (in shares)		1,000
Stock for tax withholding	(21)		(21)
Stock for tax withholding (in shares)		(4,040)
Comprehensive income (loss):
Foreign currency translation adjustment	(85)			(85)
Net income	7,085				7,085
Cumulative effect from adoption of ASU No. 2016-02	33				33
Balance at Dec. 31, 2018	10,637	$ 52	24,550	(372)	(13,593)
Balance (in shares) at Dec. 31, 2018		5,278,485
Balance at Sep. 30, 2019	17,815	$ 53	24,694	(457)	(6,475)
Balance (in shares) at Sep. 30, 2019		5,315,739
Stock-based compensation	58	$ 1	57
Stock-based compensation (in shares)		6,480
Comprehensive income (loss):
Foreign currency translation adjustment	(75)			(75)
Net income	6,130				6,130
Balance at Jun. 30, 2019	11,702	$ 52	24,637	(382)	(12,605)
Balance (in shares) at Jun. 30, 2019		5,309,259
Balance at Sep. 30, 2020	18,835	$ 53	24,913	(264)	(5,867)
Balance (in shares) at Sep. 30, 2020		5,346,291
Stock-based compensation	$ 168		168
Stock-based compensation (in shares)		25,120
Stock options exercised (in shares)	0
Stock for tax withholding	$ (6)		(6)
Stock for tax withholding (in shares)		(1,678)
Comprehensive income (loss):
Foreign currency translation adjustment	42			42
Net income	698				698
Balance at Dec. 31, 2019	17,933	$ 53	24,751	(306)	(6,565)
Balance (in shares) at Dec. 31, 2019		5,322,849
Balance at Sep. 30, 2020	18,835	$ 53	24,913	(264)	(5,867)
Balance (in shares) at Sep. 30, 2020		5,346,291
Stock-based compensation	55		55
Stock-based compensation (in shares)		8,220
Comprehensive income (loss):
Foreign currency translation adjustment	94			94
Net income	659				659
Balance at Jun. 30, 2020	$ 18,027	$ 53	$ 24,858	$ (358)	$ (6,526)
Balance (in shares) at Jun. 30, 2020		5,338,071