ACQUISITION AND RELATED PARTY ITEMS - Fair Value of Assets and Liabilities at Lacuna Acquisition Date (Details) - USD ($) $ in Thousands	Feb. 01, 2021	Mar. 31, 2021	Dec. 31, 2020
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest [Abstract]
Goodwill		$ 89,968	$ 88,276
Lacuna Diagnostics, Inc.
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination [Abstract]
Purchase price	$ 4,255
Fair value of contingent consideration	1,700
Total purchase consideration	5,955
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest [Abstract]
Cash and cash equivalents	3
Accounts receivable	170
Property and equipment, net	530
Other intangible assets, net	1,185
Deferred tax asset	167
Total assets acquired	2,055
Goodwill	3,900
Total fair value of consideration transferred	$ 5,955