Commitments And Contingencies (Narrative) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) ft²	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) ft² $ / ft²	Jun. 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
Increase in security deposit			$ 264,264.88
Security deposit	$ 364,937.68		364,937.68
Right of use asset	1,182,000		1,182,000
Increase in other assets			2,726,000
Rent expense, including common area maintenance charges	$ 65,000	$ 69,000	$ 100,000	$ 100,000
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]
Monthly operating lease expense | $ / ft²			2.25
Last Six Months Of Lease [Member]
Commitments and Contingencies [Line Items]
Monthly operating lease expense | $ / ft²			3.819
Accounting Standards Update 2016-02 [Member]
Commitments and Contingencies [Line Items]
Right of use asset						$ 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