NOTE 9. CAPITAL LEASES

The Company leases certain assets under capital leases which expire at various dates through 2022. The assets and liabilities under capital leases are recorded at the lower of present value of the minimum lease payments or the fair value of the assets. The assets are amortized over the shorter of the estimated useful lives or over the lease term. Amortization expense of assets under capital leases was $0.4 million and $0.2 million for the three months ended March 31, 2018 and 2017, respectively.

Aggregate future minimum lease payments under capital leases are as follows (in millions):


For the period ending March 31,	Total
2018	$	1.3
2019		1.3
2020		1.0
2021		0.1
2022		—
Total future minimum lease payments		3.7
Less: amount representing interest		(0.5)
Present value of future minimum lease payments		3.2
Less: current portion of capital lease obligations		(1.3)
Total capital lease obligations, less current portion	$	1.9