Revenue from sales in the U.S. increased $2.1 million, or 19.7 percent, to $12.9 million for the second quarter 2023, from $10.8 million for the second quarter 2022. Revenue from sales internationally increased $1.3 million, or 67.0 percent, to $3.2 million for the second quarter 2023, from $1.9 million for the second quarter 2022. Domestic sales accounted for 80.3 percent of revenue for the second quarter 2023, compared to 85.0 percent for the second quarter 2022.
Revenue from sales of devices increased $2.1 million, or 23.5 percent, to $10.8 million for the three months ended June 30, 2023, from $8.8 million for the same period in 2022.
Revenue from sales of our disposables, service and other increased $1.4 million, or 40.4 percent, to $4.8 million for the three months ended June 30, 2023, from $3.4 million for the same period in 2022. Revenue from the amortization of extended warranty agreements was consistent at $0.5 million for the three months ended June 30, 2023 and 2022.
For the six months ended June 30, 2023, revenue increased $6.6 million, or 26.3 percent, to $31.6 million from $25.0 million for the same period in 2022. This is attributed to the increase in our IV Infusion Pump System, and disposable sales as well as the release of our Ferro Magnetic Detection System.
Revenue from sales in the U.S. increased $4.1 million, or 19.9 percent, to $24.9 million for the six months ended June 30, 2023, from $20.8 million for the same period 2022. Revenue from sales internationally increased $2.4 million, or 57.6 percent, to $6.7 million for the six months ended 2023, from $4.2 million for the six months ended 2022. Domestic sales accounted for 78.9 percent of revenue for the second quarter 2023, compared to 83.1 percent for the six months ended 2022.
Revenue from sales of devices increased $4.1 million, or 23.9 percent, to $21.4 million for the six months ended June 30, 2023, from $17.3 million for the same period in 2022.
Revenue from sales of our disposables, service and other increased $2.5 million, or 37.1 percent, to $9.3 million for the six months ended June 30, 2023, from $6.7 million for the same period in 2022. Revenue from the amortization of extended warranty agreements was consistent at $1.0 million for the six months ended June 30, 2023 and 2022.
Cost of Revenue and Gross Profit
| | | | | | | | | | | | |
| Three Months Ended | | Six Months Ended | |
| June 30, | | June 30, | |
| 2023 | | 2022 | | 2023 | | 2022 | |
Revenue | $ | 16,130,396 | | $ | 12,721,569 | | $ | 31,605,480 | | $ | 25,032,279 | |
Cost of revenue | | 3,943,904 | | | 2,581,806 | | | 7,697,535 | | | 5,512,992 | |
Gross profit | $ | 12,186,492 | | $ | 10,139,763 | | $ | 23,907,945 | | $ | 19,519,287 | |
Gross profit percentage | | 75.5 | % | | 79.7 | % | | 75.6 | % | | 78.0 | % |
For the three months ended June 30, 2023 and 2022, cost of revenue increased $1.4 million, or 52.8 percent to $3.9 million from $2.6 million for the same period 2022. Gross profit increased $2.0 million, or 20.2 percent, to $12.2 million for the second quarter 2023 from $10.1 million for the same period in 2022. Gross profit margin was 75.5 percent for second quarter 2023, compared to 79.7 percent for the second quarter 2022. The decrease in gross profit margin is primarily due to an unfavorable overhead variance, sales mix, and increased raw material costs due to inflation.
For the six months ended June 30, 2023, cost of revenue increased $2.2 million, or 39.6 percent, to $7.7 million from $5.5 million for the same period last year. Gross profit increased $4.4 million, or 22.5 percent, to $23.9 million for the six months ended June 30, 2023 from $19.5 million for the same period in 2022. Gross profit margin was 75.6 percent for six months ended June 30, 2023, compared to 78.0 percent for the same period in 2022. The decrease in gross profit margin is primarily due to an unfavorable geographic sales mix, increased raw material costs, and overhead variances. International revenue increased to 21.1 percent from 16.9 respectively for the six months ending June 30, 2023 and 2022.