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Other Current Liabilities
 6 Months Ended
Jun. 30, 2021
Other Current Liabilities [Abstract]  
Other Current Liabilities Other Current Liabilities
    Other current liabilities at June 30, 2021 and December 31, 2020 consisted of the following:
June 30, 2021December 31, 2020
(Unaudited)
 (In thousands)
Customer advances (deposits)$28,525 $25,043 
Acquisition obligations (upfront purchase and contingent consideration)2,343 2,443 
Total$30,868 $27,486