LEASES - Operating and Financing leases (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Balance sheet presentation of our operating and financing leases
Operating lease right-of-use assets, net	$ 858	$ 858
Finance lease right-of-use assets, net	304	371
Total lease assets	1,162	1,229
Current maturities of operating lease liabilities	189	166
Current maturities of finance lease liabilities	177	222
Operating lease liabilities, less current maturities	676	697
Finance lease liabilities, less current maturities	109	159
Total lease liabilities	1,151	1,244
HemeScreen Reagent Rental [Member]
Balance sheet presentation of our operating and financing leases
Finance lease right-of-use assets, net	$ 35	$ 61