Leases	12 Months Ended
Dec. 31, 2017
Leases [Abstract]
Leases	Note F - Leases The Company has commitments under operating leases primarily for office and manufacturing space, transportation equipment, office equipment and computer equipment. Rental expense was $2.6 million in 2017, $2.1 million in 2016 and $3.4 million in 2015. Future minimum rental commitments having non-cancelable terms exceeding one year are $2.0 million in 2018, $1.8 million in 2019, $1.5 million in 2020, $1.3 million in both 2021 and 2022, and an aggregate $7.2 million thereafter. The total minimum sublease rentals to be received through 2023 under noncancelable subleases as of December 31, 2017 was $4.3 million. The Company has commitments under capital leases for equipment and vehicles. Amounts recognized as capital lease obligations are reported in Accrued expense and other liabilities and Other noncurrent liabilities in the Consolidated Balance Sheets. Future minimum rental commitments for capital leases are less than $.1 million for each of the years ended December 31, 2018, 2019, 2020 and 2021 and the related imputed interest for the capital leases in each of these years is less than $.1 million. Future minimum rental commitment and imputed interest for capital leases in 2022 is $0. Leased property and equipment under capital leases are amortized using the straight-line method over the term of the lease. Routine maintenance, repairs and replacements are expensed as incurred.

Note F - Leases

The Company has commitments under operating leases primarily for office and manufacturing space, transportation equipment, office equipment and computer equipment. Rental expense was $2.6 million in 2017, $2.1 million in 2016 and $3.4 million in 2015. Future minimum rental commitments having non-cancelable terms exceeding one year are $2.0 million in 2018, $1.8 million in 2019, $1.5 million in 2020, $1.3 million in both 2021 and 2022, and an aggregate $7.2 million thereafter. The total minimum sublease rentals to be received through 2023 under noncancelable subleases as of December 31, 2017 was $4.3 million.

The Company has commitments under capital leases for equipment and vehicles. Amounts recognized as capital lease obligations are reported in Accrued expense and other liabilities and Other noncurrent liabilities in the Consolidated Balance Sheets. Future minimum rental commitments for capital leases are less than $.1 million for each of the years ended December 31, 2018, 2019, 2020 and 2021 and the related imputed interest for the capital leases in each of these years is less than $.1 million. Future minimum rental commitment and imputed interest for capital leases in 2022 is $0. Leased property and equipment under capital leases are amortized using the straight-line method over the term of the lease. Routine maintenance, repairs and replacements are expensed as incurred.