Commitments and Contingencies (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2019

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of the future minimum lease payments under non-cancellable operating lease and future minimum capital lease payments

	Capital Leases		Operating Lease
Years Ending December 31,
2019		24		62
2020		78		24
2021		63		—
2022		33		—
2023		3
Total minimum lease payments	$	201	$	86

	Capital Leases
Less: amounts representing interest (6.39%, ranging from 10.48% to 11.56%)	$	26
Present value of minimum lease payments		175
Less: current installments under capital lease obligations		70
Total long-term portion	$	105

	Capital  Leases		Operating  Lease
Years Ending December 31,
2019		99		271
2020		78		45
2021		63		—
2022		33		—
2023		3
Total minimum lease payments	$	276	$	316

	Capital Leases
Less: amounts representing interest (ranging from 7.75% to 11.58%)	$	43
Present value of minimum lease payments		233
Less: current installments under capital lease obligations		77
Total long-term portion	$	156