Commitments - Schedule of Balance Sheet Classification of the Company's Operating Lease Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Total operating lease liabilities	$ 1,404	$ 0
Total operating lease liabilities	2,382
Total operating lease liabilities		387
Accrued And Other Liabilities Current [Member]
Total operating lease liabilities	1,404
Total operating lease liabilities		244
Other Noncurrent Liabilities [Member]
Total operating lease liabilities	$ 978
Total operating lease liabilities		$ 143