Accounts Receivable (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 4,345	$ 4,489
Royalty Revenue from Sales of NARCAN
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 4,300	$ 4,500

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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