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DEBT - Additional Information (Details)
$ in Thousands
9 Months Ended
Jul. 02, 2018
USD ($)
Jun. 30, 2019
USD ($)
May 01, 2019
USD ($)
Sep. 30, 2018
USD ($)
Sep. 28, 2018
USD ($)
Debt Instrument [Line Items]          
Long-term Debt   $ 13,527   $ 9,614  
Base Rate [Member]          
Debt Instrument [Line Items]          
Basis points deducted from prime rate   (0.50%)      
Maximum [Member] | President and Chief Executive Officer [Member]          
Debt Instrument [Line Items]          
Life Insurance, Corporate or Bank Owned, Amount   $ 2,000      
Credit Arrangements [Member] | Maximum [Member]          
Debt Instrument [Line Items]          
Minimum Debt Service Coverage Ratio One   1.25      
Minimum Debt Service Coverage Ratio Two   1.15      
EBITDA Ratio One   4.50      
EBITDA Ratio Two   5.0      
Credit Arrangements [Member] | Minimum [Member]          
Debt Instrument [Line Items]          
Minimum Debt Service Coverage Ratio One   1.0      
Minimum Debt Service Coverage Ratio Two   1.00      
EBITDA Ratio One   1.00      
EBITDA Ratio Two   1.0      
First Internet Bank of Indiana [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Periodic Payment   $ 33      
Debt Instrument, Interest Rate, Stated Percentage   3.99%      
Debt Instrument, Face Amount   $ 4,500      
Long-term Debt, Gross   4,048      
First Internet Bank of Indiana [Member] | Equipment Draw Loan [Member]          
Debt Instrument [Line Items]          
Long-term Debt   499      
Line of Credit Facility, Additional Borrowing Capacity         $ 1,429
First Internet Bank of Indiana [Member] | Construction Draw Loan [Member]          
Debt Instrument [Line Items]          
Long-term Debt   2,012      
Line of Credit Facility, Additional Borrowing Capacity         $ 4,445
First Internet Bank of Indiana [Member] | Revolving Credit Facility [Member]          
Debt Instrument [Line Items]          
Line of Credit Facility, Additional Borrowing Capacity   $ 3,500      
Basis points deducted from prime rate   0.25%      
Long-term Line of Credit   $ 572   0  
Smithers Avanza Toxicology Services LLC Acquisition [Member] | Unsecured promissory note [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Interest Rate, Stated Percentage   6.50%      
Debt Instrument, Face Amount   $ 810      
Subsequent Term Loan [Member] | First Internet Bank of Indiana [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Periodic Payment $ 78        
Debt Instrument, Interest Rate, Stated Percentage 5.06%        
Debt Instrument, Face Amount $ 5,500        
Long-term Debt $ 4,887        
Current Credit Agreement [Member] | First Internet Bank of Indiana [Member] | Equipment Draw Loan [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Interest Rate, Stated Percentage   5.20%      
Current Credit Agreement [Member] | First Internet Bank of Indiana [Member] | Construction Draw Loan [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Interest Rate, Stated Percentage   5.20%      
New Term Loan [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Periodic Payment   $ 20      
Debt Instrument, Interest Rate, Stated Percentage   4.63%      
Long-term Debt   $ 1,271   $ 0  
New Term Loan [Member] | Smithers Avanza Toxicology Services LLC Acquisition [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Face Amount     $ 1,271    
Capex Line [Member]          
Debt Instrument [Line Items]          
Long-term Debt   $ 460      
Capex Line [Member] | Capital Expenditure Line of Credit [Member]          
Debt Instrument [Line Items]          
Line of Credit Facility, Additional Borrowing Capacity     $ 1,100