Commitments and Contingencies (Details) $ in Thousands	1 Months Ended	3 Months Ended
	Aug. 31, 2013 Company	Mar. 31, 2019 USD ($) Case Patent States	Mar. 31, 2018 USD ($)
Operating Leases [Abstract]
Rent expense | $		$ 372	$ 331
Litigation and Contingencies [Abstract]
Number of companies patent infringement lawsuits filed | Company	6
Number of cases resolved		3
Number of additional infringement on patents | Patent		2
Number of cases pending		2
Number of cases filed		4
Number of states in the antitrust litigation | States		41