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General Information - Additional Information (Details) $ in Thousands	Dec. 31, 2019 USD ($) Patent	Jul. 01, 2019 USD ($)
General Information [Line Items]
Number of patents granted | Patent	37
Number of additional patents in process | Patent	5
ROU asset	$ 1,022	$ 1,608
Lease obligation	1,053	1,608
ASU 2016-02
General Information [Line Items]
ROU asset	414	1,600
Lease obligation	$ 414	1,600
Cumulative impact of change in accounting policy		$ 230

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Present value of lessee's discounted obligation for lease payments from operating lease.

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