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Note D - Leases - Maturities of Finance and Operating Lease Liabilities (Details) - USD ($) $ in Thousands		Jun. 30, 2021		Mar. 31, 2021	Dec. 31, 2020
Remainder of 2021, operating leases	[1]	$ 3,893
Remainder of 2021, finance leases				$ 126
2022, operating leases	[1]	6,744
2022, finance leases				209
2023, operating leases	[1]	4,775
2023, finance leases				166
2024, operating leases	[1]	3,328
2024, finance leases				48
2025, operating leases	[1]	1,581
2025, finance leases				6
2026, operating leases	[1]	7,505
2026, finance leases				0
Total future minimum lease payments, operating leases	[1]	27,826
Total future minimum lease payments, finance leases				555
Less: Imputed interest, operating leases	[1]	2,390
Less: Imputed interest, finance leases				36
Total lease liabilities, finance leases				$ 519
Short-term Lease Liabilities and Long-term Lease Liabilities [Member]
Total lease liabilities, operating leases		25,436	[1]		$ 27,328
Total lease liabilities, finance leases		$ 519			$ 630
[1] Non-cancelable sublease proceeds for the remainder of the fiscal year ending December 31, 2021 and the fiscal years ending December 31, 2022 and 2023 of $378k, $649k, and $236k, respectively, are not included in the table above.

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

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Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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