REVENUE RECOGNITION - Statements of Operations and Comprehensive Income (Loss) (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Jul. 02, 2018	Sep. 30, 2019	Sep. 30, 2018
REVENUE RECOGNITION
Total revenue	$ 2,852	$ 43,616	$ 26,346
Total cost of revenue		30,695	18,230
Gross profit		12,921	8,116
Operating income		(153)	14
Net loss before income taxes		(786)	(254)
Income taxes expense		4	(60)
Net loss		$ (790)	$ (194)
Diluted net loss per share		$ (0.08)	$ (0.02)
Product [Member]
REVENUE RECOGNITION
Total revenue		$ 4,568	$ 3,906
Total cost of revenue		2,991	2,326
Service [Member]
REVENUE RECOGNITION
Total revenue		39,048	22,440
Total cost of revenue		27,704	$ 15,904
Previously Reported [Member]
REVENUE RECOGNITION
Total revenue		43,642
Total cost of revenue		30,695
Gross profit		12,947
Operating income		(127)
Net loss before income taxes		(760)
Income taxes expense		4
Net loss		$ (764)
Diluted net loss per share		$ (0.08)
Previously Reported [Member] | Product [Member]
REVENUE RECOGNITION
Total revenue		$ 4,568
Previously Reported [Member] | Service [Member]
REVENUE RECOGNITION
Total revenue		39,074
New Accounting Pronouncement, Early Adoption, Effect [Member]
REVENUE RECOGNITION
Total revenue		(26)
Gross profit		(26)
Operating income		(26)
Net loss before income taxes		(26)
Net loss		$ (26)
Diluted net loss per share		$ 0.00
New Accounting Pronouncement, Early Adoption, Effect [Member] | Service [Member]
REVENUE RECOGNITION
Total revenue		$ (26)