Other Long-Term Assets

12 Months Ended

Dec. 31, 2017

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Other long-term assets consisted of the following at December 31 (in thousands):



	2017		2016
Cash surrender value of corporate-owned life insurance policies	$	3,846	$	3,240
Deferred commissions ⁽ⁱ⁾	6,803		5,302
Restricted cash ⁽ⁱⁱ⁾	3,333		3,317
Prepaid expenses, deposits and other	1,384		2,058
Total other long-term assets	$	15,366	$	13,917

⁽ⁱ⁾Deferred commissions represent customer acquisition costs to secure long-term contracts. The Company capitalizes incremental and direct costs related to a specific contract and recognizes such costs as expense over the term of the contract in proportion to the contract revenue.

⁽ⁱⁱ⁾ As of December 31, 2017, restricted cash primarily consisted of $2.7 million of sales proceeds related to a long-term contract with a specific customer. These proceeds are held in escrow until certain billing milestones are achieved, and then specified amounts are transferred to the Company's operating accounts. Restricted cash also contained $0.6 million related to a performance guarantee related to an international customer sales contract.