BUSINESS COMBINATIONS - Additional Information (Details)			12 Months Ended
	Nov. 08, 2019 USD ($) shares	May 01, 2019 USD ($) item shares	Sep. 30, 2020 USD ($) shares	Sep. 30, 2019 USD ($) shares	Dec. 01, 2019 USD ($)	Nov. 29, 2019 USD ($)
BUSINESS COMBINATIONS
Common Stock, Shares, Issued | shares			10,977,675	10,510,694
Payments to Acquire Businesses, Gross			$ 3,931,000	$ 1,271,000
Operating Lease, Payments			948,000
Revenues			60,469,000	43,616,000
Net loss			(4,685,000)	$ (790,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		$ 2,595,000
Smithers Avanza Toxicology Services LLC acquisition
BUSINESS COMBINATIONS
Business Combination, Consideration Transferred		2,595,000
Escrow Deposit Disbursements Related to Property Acquisition		$ 125,000
Common Stock, Shares, Issued | shares		200
Payments to Acquire Businesses, Gross		$ 1,271,000
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable		$ 394,000
Class of Warrant or Right, Covenants Period		5 years
Revenues			10,748,000
Net loss			596,000
Smithers Avanza Toxicology Services LLC acquisition | Promissory Note [Member]
BUSINESS COMBINATIONS
Debt Instrument, Face Amount		$ 810,000
Debt Instrument, Interest Rate, Effective Percentage		6.50%
PCRS acquisition
BUSINESS COMBINATIONS
Business Combination, Contingent Consideration, Asset	$ 5,857,000
Business Combination, Consideration Transferred	1,500,000
Payments for purchase of certain real property	$ 2,500,000
Common Stock, Shares, Issued | shares	240
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned						$ 1,133,000
Business Acquisition, Transaction Costs			248,000
Revenues			4,780,000
Net loss			176,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			2,081,000		$ 5,857,000
PCRS acquisition | Unsecured promissory note
BUSINESS COMBINATIONS
Debt Instrument, Interest Rate, Stated Percentage	4.50%
Debt Instrument, Face Amount	$ 800,000		$ 800,000
Lease Arrangements [Member] | Smithers Avanza Toxicology Services LLC acquisition
BUSINESS COMBINATIONS
Lessee, Operating Lease, Term of Contract		5 years 8 months
Number of Lease Extension Terms | item		2
Lessee, Operating Lease, Renewal Term		5 years
Lease Arrangements [Member] | Smithers Avanza Toxicology Services LLC acquisition | Minimum
BUSINESS COMBINATIONS
Operating Lease, Payments		$ 400,000
Lease Arrangements [Member] | Smithers Avanza Toxicology Services LLC acquisition | Maximum
BUSINESS COMBINATIONS
Operating Lease, Payments		$ 600,000