Commitments And Contingencies (Narrative) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($) ft²	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) ft²	Sep. 30, 2018 USD ($)	May 31, 2019 ft²	Jan. 01, 2019 USD ($)	Jan. 31, 2017 ft²
Commitments and Contingencies [Line Items]
Area Of Lease | ft²	50,298		50,298				15,697
Lease term	10 years		10 years
Lease renewable term	7 years		7 years
Period of base rent abatement			4 months
Increase in security deposit			$ 264,264.88
Security deposit	$ 364,937.68		364,937.68
Right-of-use assets	1,190,000		1,190,000
Increase in other assets			2,734,000
Rent expense, including common area maintenance charges	$ 100,000	$ 57,000	$ 200,000	$ 200,000
Maximum [Member]
Commitments and Contingencies [Line Items]
Written notice period for right to extend lease term			12 months
Minimum [Member]
Commitments and Contingencies [Line Items]
Written notice period for right to extend lease term			9 months
Lease Amendment [Member]
Commitments and Contingencies [Line Items]
Area Of Lease | ft²					34,601
Lease Amendment - Phase One [Member]
Commitments and Contingencies [Line Items]
Area Of Lease | ft²	13,280		13,280
Lease Amendment - Phase Two [Member]
Commitments and Contingencies [Line Items]
Area Of Lease | ft²	21,321		21,321
Expansion Premises [Member]
Commitments and Contingencies [Line Items]
Lease term, base monthly rent per square foot	$ 2.25		$ 2.25
Last Six Months Of Lease [Member]
Commitments and Contingencies [Line Items]
Lease term, base monthly rent per square foot	$ 3.819		3.819
Accounting Standards Update 2016-02 [Member]
Commitments and Contingencies [Line Items]
Right-of-use assets						$ 100,000
Increase in total lease liability			2,400,000
Increase in right-of-use assets			1,100,000
Increase in other assets			$ 1,300,000