SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Changes in the balances of intangible assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Finite-lived Intangible Assets [Roll Forward]
Amortization of intangible assets begginning balance	$ 3,318	$ 0
Amortization		(165)
Amortization of intangible assets ending balance	2,873	3,318
Seventh Wave Laboratories LLC acquisition [Member]
Finite-lived Intangible Assets [Roll Forward]
Seventh Wave Acquisition		3,483
Trademarks [Member]
Finite-lived Intangible Assets [Roll Forward]
Amortization of intangible assets begginning balance	1,150	0
Amortization	(78)	(20)
Amortization of intangible assets ending balance	1,072	1,150
Trademarks [Member] | Seventh Wave Laboratories LLC acquisition [Member]
Finite-lived Intangible Assets [Roll Forward]
Seventh Wave Acquisition		1,170
Client Relationships [Member]
Finite-lived Intangible Assets [Roll Forward]
Amortization of intangible assets begginning balance	1,918	0
Amortization	(248)	(62)
Amortization of intangible assets ending balance	1,670	1,918
Client Relationships [Member] | Seventh Wave Laboratories LLC acquisition [Member]
Finite-lived Intangible Assets [Roll Forward]
Seventh Wave Acquisition		1,980
Noncompete Agreements [Member]
Finite-lived Intangible Assets [Roll Forward]
Amortization of intangible assets begginning balance	178	0
Amortization	(47)	(12)
Amortization of intangible assets ending balance	131	178
Noncompete Agreements [Member] | Seventh Wave Laboratories LLC acquisition [Member]
Finite-lived Intangible Assets [Roll Forward]
Seventh Wave Acquisition		190
Backlog [Member]
Finite-lived Intangible Assets [Roll Forward]
Amortization of intangible assets begginning balance	72	0
Amortization	(72)	(71)
Amortization of intangible assets ending balance	$ 0	72
Backlog [Member] | Seventh Wave Laboratories LLC acquisition [Member]
Finite-lived Intangible Assets [Roll Forward]
Seventh Wave Acquisition		$ 143