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Intangible Assets (Tables) | 6 Months Ended
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Jun. 30, 2019
Intangible Assets |
Schedule of intangible assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | June 30, |  | December 31, |
​ | ​ | 2019 | ​ | 2018 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
License agreements | ​ | $ | 1,046 | ​ | $ | 1,034 | ​
Less: accumulated amortization | ​ | ​ | (600) | ​ | ​ | (553) | ​
License agreements, net | ​ | $ | 446 | ​ | $ | 481 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Patents | ​ | ​ | 1,022 | ​ | ​ | 755 | ​
Less: accumulated amortization | ​ |  | (64) | ​ |  | (55) | ​
Patents, net | ​ | $ | 958 | ​ | $ | 700 | ​
Intangible assets, net | ​ | $ | 1,404 | ​ | $ | 1,181 | ​

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