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Intangible Assets and Goodwill - Schedule of Amortization Expenses for Intangible Assets (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Amortization of intangible assets | $ 62 | $ 60
Patents [Member] |  |
Amortization of intangible assets | 4 | 7
Licenses [Member] |  |
Amortization of intangible assets | 4 |
Customer Relationships [Member] |  |
Amortization of intangible assets | 51 | 50
Trade Name [Member] |  |
Amortization of intangible assets | 2 | 2
Non-Competition Clause [Member] |  |
Amortization of intangible assets |  | 1
State Pharmacy Licenses [Member] |  |
Amortization of intangible assets | $ 1 |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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