Fair value of financial instruments - Innovatus Term Loan (Details) $ / shares in Units, $ in Thousands	Sep. 30, 2019 USD ($) $ / shares shares
Innovatus
Fair value of financial instruments
Purchase price (per share) \| $ / shares	$ 1.53
Series D Warrant
Fair value of financial instruments
Shares called by warrant \| shares	368,779
Innovatus Term Loan
Fair value of financial instruments
Principal amount \| $	$ 25,000

Exercise price per share or per unit of warrants or rights outstanding.

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- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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