COMMITMENTS

We have entered into various operating lease agreements for office facilities and equipment, the last of which expires in fiscal 2023. The office facility leases generally require us to pay a pro-rata share of the lessor’s operating expenses. Certain operating leases contain escalation clauses and are being amortized on a straight-line basis over the term of the lease.

The following schedule reflects future minimum rental commitments under noncancelable operating leases (in thousands):



Fiscal year	Amount
2018	$	1,398
2019	1,148
2020	609
2021	277
2022	208
Thereafter	121
Total minimum payments required	$	3,761

The following schedule shows the composition of total rental expense for all operating leases for the years ended September 30 (in thousands):



	Fiscal years ended September 30,
	2017		2016			2015
Rentals	$	1,342	$	1,613		$	2,076
Less: sublease rentals	—		(46		)	(56		)
Total rental expense	$	1,342	$	1,567		$	2,020