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GOODWILL
3 Months Ended
Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill Disclosure [Text Block]
NOTE 6 — GOODWILL AND OTHER INTANGIBLE ASSETS

Goodwill is reviewed for impairment at least annually at the beginning of the fourth quarter, or more frequently if impairment indicators arise. A portion of the Company’s goodwill is not expected to be deductible for tax purposes. The changes in the carrying amount of goodwill during the period are as follows (in thousands):
 March 31, 2020December 31, 2019
Balance at beginning of period$118,145  $118,127  
Flow cytometry acquisition $—  $18  
Balance at end of period$118,145  $118,145