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Future Operating Lease Payment Obligations and Future Minimum Lease Payments under Capital Leases (Detail) - USD ($)	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Operating leases
Rest of 2019	$ 967,000
2019		$ 1,372,000
2020	1,141,000	1,138,000
2021	972,000	969,000
2022	691,000	689,000
2023	391,000	390,000
2024-2028	119,000	120,000
Total Payments	4,281,000	4,678,000
Less: Interest	426,000
Amount of Lease Obligations Recorded on Consolidated Balance Sheets	3,855,000
Capital lease
Rest of 2019	2,369,000
2019		3,069
2020	2,576,000	2,535
2021	96,000	93
2022	33,000	32
2023	15,000	14
2024-2028	0	0
Total Payments	5,089,000	5,743
Less: Interest	122,000
Amount of Lease Obligations Recorded on Consolidated Balance Sheets	$ 4,967,000	$ 5,800,000	$ 8,000,000

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- Definition

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Present value of lessee's discounted obligation for lease payments from operating lease.

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