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Leases | 3 Months Ended
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Mar. 31, 2019
Leases [Abstract] |
Lessee, Operating Leases [Text Block] | Note 7 – Leases The Company has operating leases for its research and development and manufacturing facilities, corporate headquarters and offices and certain equipment. The operating leases have expirations that range from 1 year to 8 years, some of which include options to extend the leases or terminate the leases early. Options to extend the leases or terminate the leases early are only included in the lease term when it is reasonably certain that the option will be exercised. The facility leases contain provisions for future rent increases, and obligate the Company to pay building operating costs. The operating leases represent the right to obtain substantially all of the economic benefits from use of the identified asset and the right to direct the use of the asset and are capitalized as right of use (“ROU”) assets for the expected lease term (net of the deferred rent liability) with corresponding lease liabilities representing the obligation to make lease payments arising from the lease. Supplemental balance sheet information related to leases as of March 31, 2019 was as follows (in thousands, except weighted-average remaining lease term and discount rate):
Lease Assets and Liabilities |  | Classification |  | Amount |
Assets: |  |  |  |  |
Operating lease ROU assets |  | Other non-current assets |  | $ | 11,049 |
Liabilities: |  |  |  |  |  |
Current operating lease liabilities |  | Other current liabilities |  | $ | 3,491 |
Non-current operating lease liabilities |  | Other non-current liabilities |  |  | 17,396 |
Total operating lease liabilities |  |  |  | $ | 20,887 |
Weighted-average remaining lease term (years) |  |  |  |  | 5.58 |
Weighted-average discount rate |  |  |  |  | 15.25 | %
Lease expense for the operating and short-term leases for the three months ended March 31, 2019 was as follows (in thousands):
|  | Amount |
Operating lease expense |  | $ | 1,265 |
Short-term lease expense |  |  | 170 |
Total lease expense |  | $ | 1,435 |
Supplemental cash flow information related to leases for the three months ended March 31, 2019 was as follows (in thousands):
|  | Amount |
Cash paid for amounts included in the measurement of operating lease liabilities |  | $ | 1,646 |
ROU assets obtained in exchange for operating lease obligations |  |  | 11,893 |
As of March 31, 2019, maturities of lease liabilities were as follows (in thousands):
Year |  | Amount |
2019 (remainder) |  | $ | 5,008 |
2020 |  |  | 5,311 |
2021 |  |  | 5,292 |
2022 |  |  | 5,409 |
2023 |  |  | 4,919 |
Thereafter |  |  | 5,754 |
Total operating lease payments |  |  | 31,693 |
Less: imputed interest |  |  | (10,806 | )
Total operating lease liabilities |  | $ | 20,887 |
During the three months ended March 31, 2019, the Company did not enter into any additional operating or finance leases. In April 2019, the Company extended the lease at its Rockville, MD facility to expire in January 2024. Under the amended lease, the Company will pay approximately $1.7 million per year in base rent, which was not included in the Company’s operating lease liabilities as of March 31, 2019 as the Company was not reasonably certain that the option would be exercised.

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- Definition The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=77888251 + Details
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