Leases - Schedule of Right-of-Use Assets and Lease Liabilities (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Lessee Lease Description [Line Items]
Right-of-use assets	$ 865
Lease liabilities	910
Del Mar, CA [Member]
Lessee Lease Description [Line Items]
Right-of-use assets	34
Lease liabilities	38
Burlingame, CA [Member]
Lessee Lease Description [Line Items]
Right-of-use assets	464
Lease liabilities	504
Edwardsville, IL [Member]
Lessee Lease Description [Line Items]
Right-of-use assets	367
Lease liabilities	$ 368