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BUSINESS DESCRIPTION (Narrative) (Details) - USD ($)					3 Months Ended				12 Months Ended
	Apr. 02, 2021	Jun. 26, 2020	Mar. 26, 2020	Sep. 07, 2018	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2020	Apr. 30, 2020	Apr. 13, 2020
Business Acquisition [Line Items]
Oncology test reporting time						1 day
Net loss					$ 1,500,000
Working deficiency					300,000
Net cash used in operating activities					(1,289,000)			$ (1,589,000)
Proceeds from issuance of common stock					$ 1,260,000			$ 1,350,000
Proceeds from long-term debt									$ 800,000
Common stock, par value					$ 0.01				$ 0.01
Term of test reporting time for patients					1 day
Maximum
Business Acquisition [Line Items]
Oncology test reporting time							10 days
Term of test reporting time for patients					10 days
Minimum
Business Acquisition [Line Items]
Oncology test reporting time							7 days
Term of test reporting time for patients					7 days
Sales Agreement with Alliance Global Partners
Business Acquisition [Line Items]
Maximum aggregate initial offering price											$ 50,000,000
Lincoln Park [Member]
Business Acquisition [Line Items]
Value of shares issued			$ 10,000,000	$ 10,000,000
Shares sold in offering (in shares)			4,980,000					930,012
Proceeds from issuance of common stock								$ 1,300,000
Equity purchase agreement value remaining available			$ 1,200,000
Sale of common stock		4,500,000
LP 2020 Purchase Agreement [Member]
Business Acquisition [Line Items]
Proceeds from issuance of common stock			$ 8,800,000
Subsequent Events | Sales Agreement with Alliance Global Partners
Business Acquisition [Line Items]
Proceeds from issuance of common stock	$ 15,400,000
Common stock, par value	$ 0.01
Sale of common stock	4,501,000
Additional shares available for future sales	$ 6,600,000
Subsequent Events | Sales Agreement with Alliance Global Partners | Maximum
Business Acquisition [Line Items]
Proceeds from issuance of common stock	$ 22,000,000
Joint Venture [Member]
Business Acquisition [Line Items]
Percentage of interest in joint venture										49.00%
Joint Venture [Member] | Poplar Put Right [Member] | Scenario, Plan [Member]
Business Acquisition [Line Items]
Percentage of interest in joint venture										100.00%
Price per share										$ 1.00
Purchase price										$ 51
Joint Venture [Member] | Popular Healthcare PLLC [Member]
Business Acquisition [Line Items]
Percentage of interest in joint venture										51.00%

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