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Revenue Recognition - Information by Type (Details) - USD ($) | 3 Months Ended | 6 Months Ended
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Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Disaggregation of Revenue |  |  |  |
Total Devices Revenue | $ 6,441,573 | $ 5,096,056 | $ 12,400,935 | $ 9,925,534
Disposables and Services | 2,313,755 | 1,909,043 | 4,350,428 | 3,848,134
Amortization of extended warranty agreements | 470,268 | 371,686 | 911,826 | 711,268
Total revenue | 9,225,596 | 7,376,785 | 17,663,189 | 14,484,936
MRI Compatible IV Infusion Pump Systems |  |  |  |
Disaggregation of Revenue |  |  |  |
Total Devices Revenue | 4,550,542 | 3,590,538 | 8,743,296 | 7,216,160
MRI Compatible Patient Vital Signs Monitoring Systems |  |  |  |
Disaggregation of Revenue |  |  |  |
Total Devices Revenue | $ 1,891,031 | $ 1,505,518 | $ 3,657,639 | $ 2,709,374

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