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Company Operations by Product, Customer and Geographic Area (Tables)
12 Months Ended
Dec. 31, 2021
Segment Reporting [Abstract]  
Revenue from External Customers by Product and Services
The following table presents a summary of total revenues by product for the twelve months ended December 31, 2020 and 2019:

 Revenue by Product: 20202019
Bloxiverz$2,201 $7,479 
Vazculep10,429 33,152 
Akovaz9,545 18,642 
Other159 (58)
Product sales$22,334 $59,215 
Schedule of Revenue by Major Customers by Reporting Segments
The following table presents a summary of total revenues by significant customer for the twelve months ended December 31, 2020 and 2019: 
Revenue by Significant Customer:20202019
McKesson Corporation$5,758 $14,900 
Cardinal Health5,155 15,088 
AmerisourceBergen 3,155 12,059 
QuVa Pharma3,117 3,252 
Others5,149 13,916 
Product sales$22,334 $59,215 
Revenue from External Customers by Geographic Areas All revenue earned during the years ended December 31, 2020 and 2019 was generated in the U.S.Concentration of credit risk with respect to accounts receivable was limited due to the high credit quality comprising a significant portion of the Company’s customers. Management periodically monitors the creditworthiness of the Company’s customers and believes that it has adequately provided for any exposure to potential credit loss.
Long-lived Assets by Geographic Areas The following table summarizes non-monetary long-lived assets by geographic region as of December 31, 2021, 2020, and 2019:
Long-lived Assets by Geographic Region: 202120202019
U.S.$19,605 $20,424 $22,254 
France— 11 196 
Ireland9,817 6,047 7,244 
Total$29,422 $26,482 $29,694