Deferred Revenue - Summary Current vs. Long Term Deferred Revenue (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Deferred Revenue Arrangement [Line Items]
Current portion	$ 760	$ 379
Long-term portion	2,083	2,116
Total	2,843	2,495
BED
Deferred Revenue Arrangement [Line Items]
Current portion	304
Long-term portion	483
Total	787	895
Other Opioid Treatments
Deferred Revenue Arrangement [Line Items]
Current portion	0
Long-term portion	1,600
Total	1,600	1,600
Grants
Deferred Revenue Arrangement [Line Items]
Current portion	456
Long-term portion	0
Total	$ 456	$ 0

The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

The noncurrent portion of deferred revenue amount as of balance sheet date. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized, and is not expected to be recognized in the next twelve months. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

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