Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%		35.00%
Deferred Offering Costs	$ 34,000		$ 34,000		$ 77,000
Revenues	946,000	$ 1,298,000	3,520,000	$ 2,368,000
Capital Lease Obligations, Noncurrent	$ 2,400,000		$ 2,400,000
Accounting Standards Update 2013-07 [Member]
Tenant Reimbursement		110,000		347,000
Accounting Standards Update 2013-07 [Member] | Rent [Member]
Revenues		$ 1,200,000		$ 2,000,000
Accounting Standards Update 2016-02 [Member]
Lease, Practical Expedient, Lessor Single Lease Component [true false]	true		true
Lease, Practical Expedients, Package [true false]			true
Prepaid Expenses and Other Current Assets [Member]
Deferred Offering Costs	$ 3,500,000		$ 3,500,000		$ 5,100,000