Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Schedule of Balances by Type of Long-Lived Assets

The balances by type were as follows at December 31:

	2021				2020
(In thousands)	Cost		Accumulated Depreciation/ Amortization		Cost		Accumulated Depreciation/ Amortization
Furniture and fixtures	$	2,321	$	(2,143)	$	2,220	$	(2,068)
Office equipment	906		(842)		848		(772)
Computer hardware	10,666		(9,962)		10,282		(8,987)
Purchased software	38,466		(38,046)		38,434		(37,404)
Costs of internal-use software	12,500		(10,028)		10,783		(8,959)
Leasehold improvements	4,987		(3,319)		4,787		(2,777)
Total	$	69,846	$	(64,340)	$	67,354	$	(60,967)