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BUSINESS COMBINATIONS - Additional Information (Details) $ in Thousands |  |  | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Nov. 08, 2019 USD ($) | May 01, 2019 USD ($) item shares | Dec. 31, 2019 USD ($) shares | Dec. 31, 2018 USD ($) | Nov. 29, 2019 USD ($) | Sep. 30, 2019 shares | May 31, 2019 USD ($)
BUSINESS COMBINATIONS |  |  |  |  |  |  |
Common Stock, Shares, Issued | shares |  |  | 10,805,057 |  |  | 10,510,694 |
Payments to Acquire Businesses, Gross |  |  | $ 2,165 | $ 684 |  |  |
Finance Lease, Liability, Payment, Due |  |  | 4,766 |  |  |  |
Operating Lease, Payments |  |  | 58 |  |  |  |
Revenues |  |  | 12,918 | 8,625 |  |  |
Net loss |  |  | (1,426) | $ (85) |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  |  |  |  |  |  | $ 2,595
Smithers Avanza Toxicology Services LLC acquisition |  |  |  |  |  |  |
BUSINESS COMBINATIONS |  |  |  |  |  |  |
Business Combination, Consideration Transferred |  | $ 2,595 |  |  |  |  |
Escrow Deposit Disbursements Related to Property Acquisition |  | $ 125 |  |  |  |  |
Common Stock, Shares, Issued | shares |  | 200 |  |  |  |  |
Payments to Acquire Businesses, Gross |  | $ 1,271 |  |  |  |  |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable |  | $ 394 |  |  |  |  |
Class of Warrant or Right, Covenants Period |  | 5 years |  |  |  |  |
Revenues |  |  | 2,695 |  |  |  |
Net loss |  |  | 31 |  |  |  |
Smithers Avanza Toxicology Services LLC acquisition | Promissory Note [Member] |  |  |  |  |  |  |
BUSINESS COMBINATIONS |  |  |  |  |  |  |
Debt Instrument, Face Amount |  | $ 810 |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  | 6.50% |  |  |  |  |
PCRS acquisition |  |  |  |  |  |  |
BUSINESS COMBINATIONS |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Asset | $ 5,857 |  |  |  |  |  |
Business Combination, Consideration Transferred | 1,500 |  |  |  |  |  |
Payments for purchase of certain real property | $ 2,500 |  |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned |  |  |  |  | $ 1,133 |  |
Business Acquisition, Transaction Costs |  |  | 214 |  |  |  |
Revenues |  |  | 381 |  |  |  |
Net loss |  |  | $ 66 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  | $ 5,857 |  |  |  |  |
PCRS acquisition | Unsecured promissory note |  |  |  |  |  |  |
BUSINESS COMBINATIONS |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.50% |  |  |  |  |  |
Debt Instrument, Face Amount | $ 800 |  |  |  |  |  |
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 |  |  |  |  |
Lease Arrangements [Member] | Smithers Avanza Toxicology Services LLC acquisition | Maximum |  |  |  |  |  |  |
BUSINESS COMBINATIONS |  |  |  |  |  |  |
Operating Lease, Payments |  | $ 600 |  |  |  |  |

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