RELATED PARTY TRANSACTIONS (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
RELATED PARTY TRANSACTIONS
Related party transaction expenses	$ 405,000	$ 77,000	$ 864,000	$ 306,000
Sponsored Research Agreement with The Baylor College of Medicine ("BCM")
RELATED PARTY TRANSACTIONS
Related party transaction expenses	11,000	15,000	68,000	30,000
Workforce Grant Agreement with BCM
RELATED PARTY TRANSACTIONS
Related party transaction expenses	130,000	0	278,000	0
Clinical Trial Agreement with BCM
RELATED PARTY TRANSACTIONS
Related party transaction expenses	213,000	0	213,000	0
Consulting Agreement with Dr. Juan Vera
RELATED PARTY TRANSACTIONS
Related party transaction expenses	0	58,000	0	233,000
Chief Development Officer | Consulting Agreement with Dr. Juan Vera
RELATED PARTY TRANSACTIONS
Consulting fees		58,000		233,000
Research and development
RELATED PARTY TRANSACTIONS
Related party transaction expenses	405,000	77,000	864,000	306,000
Research and development | Sponsored Research Agreement with The Baylor College of Medicine ("BCM")
RELATED PARTY TRANSACTIONS
Related party transaction expenses	11,000	15,000	68,000	30,000
Research and development | Clinical Supply Agreement with BCM [Member]
RELATED PARTY TRANSACTIONS
Related party transaction expenses	0	0	200,000	0
Research and development | Workforce Grant Agreement with BCM
RELATED PARTY TRANSACTIONS
Related party transaction expenses	130,000	0	278,000	0
Research and development | Clinical Trial Agreement with BCM
RELATED PARTY TRANSACTIONS
Related party transaction expenses	213,000	0	213,000	0
Research and development | Purchases from Bio-Techne Corporation
RELATED PARTY TRANSACTIONS
Related party transaction expenses	51,000	4,000	105,000	43,000
Research and development | Consulting Agreement with Dr. Juan Vera
RELATED PARTY TRANSACTIONS
Related party transaction expenses	$ 0	$ 58,000	$ 0	$ 233,000