Organization and Significant Accounting Policies - Summary of Intangible Asset Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Gross Carrying Amount	$ 1,897	$ 2,092
Accumulated Amortization	(991)	(928)
Net Carrying Amount	906	1,164
Patent assets
Gross Carrying Amount	1,897	2,092
Accumulated Amortization	(991)	(928)
Net Carrying Amount	$ 906	$ 1,164
Minimum | Patent assets
Amortization Period	1 year
Maximum | Patent assets
Amortization Period	20 years